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Forum: 240Z, 260Z, 280Z Performance / Technical 04-09-2018, 02:57 PM
Replies: 0
Views: 176
Posted By jalexquijano
misfire and sputtering on acceleration! Running rough!

My 240z is sputtering, coughing and misfiring during the first 15 minutes since cranked. Is this normal? I have to run it with the choke lever pulled until the temp reaches to half of the temp gauge....
Forum: 240Z, 260Z, 280Z Performance / Technical 03-08-2018, 06:32 AM
Replies: 0
Views: 176
Posted By jalexquijano
Carter 4070 Electric Fuel Pump for 3 screws su carburetors

Recently purchased a couple of Airtex 8012SX which advertise as 5.5 to 9 psi. Once plumbed into the fuel lines when measuring the PSI before the carbs, the fuel pressure gauge reads 3.2 psi. I guess...
Forum: 240Z, 260Z, 280Z Performance / Technical 05-01-2017, 07:27 AM
Replies: 0
Views: 312
Posted By jalexquijano
Deceleration popping at the exhaust on 1972 240z

Just replaced my former stock 2" exhaust system with Dynamax muffler with an MSA Premium exhaust for stock manifold system:

Motorsport! MSA Premium Exhaust System, 70-72, 74 240Z-260Z (For...
Forum: 240Z, 260Z, 280Z Performance / Technical 05-01-2017, 07:20 AM
Replies: 1
Views: 538
Posted By jalexquijano
it did not solve the percolation!

it did not solve the percolation!
Forum: 240Z, 260Z, 280Z Performance / Technical 05-01-2017, 07:20 AM
Replies: 27
Views: 3,208
Posted By jalexquijano
nice advice!!! valves were adjusted. Still have...

nice advice!!! valves were adjusted. Still have fuel percolation issues at the carbs. trying to solve. I guess i will need to find a better heat shield and insulator.
Forum: 240Z, 260Z, 280Z (S30) Forums 04-26-2017, 01:55 PM
Replies: 0
Views: 569
Posted By jalexquijano
Popping or backfire on deceleration, New Exhaust system on 1972 240z

Just swapped completely the stock exhaust system on my 1972 240z with an MSA PREMIUM EXHAUST KIT:

Motorsport! MSA Premium Exhaust System, 70-72, 74 240Z-260Z (For Stock Manifold) - The Z Store!...
Forum: 240Z, 260Z, 280Z Performance / Technical 02-24-2017, 12:35 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
I have a couple of additional queries regarding...

I have a couple of additional queries regarding this old post:

1. If i decide to adjust the valve clearances on my 1972 240z with Shneider 274F in COLD, are the clearances as follows:

Intake...
Forum: 240Z, 260Z, 280Z Performance / Technical 01-17-2017, 01:25 PM
Replies: 1
Views: 538
Posted By jalexquijano
Does Replacing Stock Metal fuel rail really eliminates percolation???

My 1972 240z presents fuel percolation after 15 -20 mins sitting on traffic jams under 33C temperature (Tropical weather)/ Panama. I have already installed some heat shield extensions to cover the...
Forum: 240Z, 260Z, 280Z (S30) Forums 08-23-2016, 06:00 PM
Replies: 1
Views: 973
Posted By jalexquijano
Recommendable Electric Fuel Pump 3.5 to 4 psi for Datsun 240z with dual SU carbs

Have seen different options for replacing my AIRTEX 8012S 5.5 to 9psi electric fuel pump for my 1972 240z. I am narrowing my decisin to the following:


Facet Electric Fuel Pump


1x Facet...
Forum: 240Z, 260Z, 280Z (S30) Forums 03-06-2016, 06:27 AM
Replies: 2
Views: 502
Posted By jalexquijano
5 psi fuel pressure could cause stumbling or hesitation at low rpms????

My 1972 240z still presents a slight hesitation (back and forth shaking) after releasing the clutch and accelerating from 1,000 to 2,000 rpms. After 2,000 rpms the hesitation is gone. This is also...
Forum: 240Z, 260Z, 280Z Performance / Technical 02-22-2016, 09:27 AM
Replies: 0
Views: 526
Posted By jalexquijano
AIRTEX 8012s electric fuel pump any good???

Have bought 3 ot this electric fuel pumps:

Amazon.com: Customer Reviews: Airtex E8012S Electric Fuel Pump...
Forum: 240Z, 260Z, 280Z Appearance Exterior, Interior 02-18-2016, 01:05 PM
Replies: 0
Views: 951
Posted By jalexquijano
HOW MUCH POR-15 FOR A 240z???? Any kit available??

Im about to restore and paint my 1972 240z at a shop which unfortunately has no sand blasting machine. They depend on wire brush and other hand tools.


Anyway, i would like to know how much...
Forum: 240Z, 260Z, 280Z Appearance Exterior, Interior 02-18-2016, 01:03 PM
Replies: 2
Views: 1,841
Posted By jalexquijano
Im about to restore and paint my 1972 240z at a...

Im about to restore and paint my 1972 240z at a shop which unfortunately has no sand blasting machine. They depend on wire brush and other hand tools.


Anyway, i would like to know how much...
Forum: 240Z, 260Z, 280Z Performance / Technical 02-10-2016, 09:14 AM
Replies: 1
Views: 663
Posted By jalexquijano
Problem was solved! The exhaust gasket was...

Problem was solved! The exhaust gasket was damaged! No more backfire!
Forum: 240Z, 260Z, 280Z Performance / Technical 02-10-2016, 09:00 AM
Replies: 3
Views: 1,328
Posted By jalexquijano
The sympom i have is the following: Car runs...

The sympom i have is the following:

Car runs great when cool and during non stop situations. However, when car is left at idle on traffic jams or long lasting traffic lights the idle becomes rough...
Forum: 240Z, 260Z, 280Z Performance / Technical 01-27-2016, 04:28 PM
Replies: 3
Views: 1,328
Posted By jalexquijano
custom heat shield for 1972 240z su carbs

Does anyone know who fabricates a custom heat shield for a 1972 240z covering the float chambers and each and every part between the manifold and the SU Round Top Carbs?

THis guy is making his...
Forum: 280ZX Performance / Technical 01-22-2016, 06:31 AM
Replies: 43
Views: 5,428
Posted By jalexquijano
I also have an unsolved overheating problem which...

I also have an unsolved overheating problem which causes rough idle and stalling on my 1972 240z with round top SU carburetors, which i describe as follows:

Crank the engine at the garage, if it...
Forum: 240Z, 260Z, 280Z (S30) Forums 01-19-2016, 03:24 PM
Replies: 4
Views: 738
Posted By jalexquijano
Carbs are synced! Problem is that whenever the...

Carbs are synced! Problem is that whenever the car is stuck in traffic after 15 mins of driving the idle becomes rough and the plugs start to become black till point where the car stalls. How do i...
Forum: 240Z, 260Z, 280Z (S30) Forums 01-19-2016, 08:45 AM
Replies: 4
Views: 738
Posted By jalexquijano
How do i rule this out??

How do i rule this out??
Forum: 240Z, 260Z, 280Z (S30) Forums 01-19-2016, 06:51 AM
Replies: 4
Views: 738
Posted By jalexquijano
1972 204z Brake Booster internal leak test?

Could a Vacuum leak on a Brake Booster of a 1972 240z be the cause for rough idle and stalling at traffic lights or intersections after 15 mins of driving? Mechanic carried out a test with a...
Forum: 280ZX (S130) Forums 12-08-2015, 08:31 AM
Replies: 13
Views: 14,107
Posted By jalexquijano
Roger, I have the exact same problem with my...

Roger,

I have the exact same problem with my 1972 240z carrying 2 Hitachi SU carbs recently remanufactured my Ztherapy, Schneider 274F cam with .175 lashpads, new rocker arms and springs. Also...
Forum: 240Z, 260Z, 280Z Performance / Technical 12-05-2015, 07:15 PM
Replies: 0
Views: 563
Posted By jalexquijano
sudden erratic idle and stalling in traffic jam

Today my 1972 240z with 274F Schneider Cam accelerated fine at high rpms but whenever it got stuck in 2 to 3 minutes traffic jam, the idle started to become erratic to a point the rpm fell to 100 RPM...
Forum: 240Z, 260Z, 280Z Performance / Technical 12-04-2015, 01:56 PM
Replies: 1
Views: 663
Posted By jalexquijano
Backfire while decelerating (sudden shotgun sound)

I read that backfiring through the carbs is usually caused by the timing being to far advanced. It is trying to fire while the intake valve is still partially open. This is the one that will cause...
Forum: 240Z, 260Z, 280Z Performance / Technical 11-30-2015, 02:28 PM
Replies: 2
Views: 778
Posted By jalexquijano
What I need is an idle up electronic solenoid to...

What I need is an idle up electronic solenoid to raise the idle of my 1972 240z when the AC compressor is on! Maybe i can custom fabricate the bracket for the solenoid. It's a simple on/off 12 volt...
Forum: 240Z, 260Z, 280Z Performance / Technical 11-27-2015, 07:00 PM
Replies: 2
Views: 778
Posted By jalexquijano
Idle raise electrical solenoid for 240z!!!!!

Anyone knows of any generic idle stop solenoid that can be used to boost the RPMS when the compressor of the Air Conditioner is activated? I sent an e-mail to carb junkies but they told me their...
Forum: 240Z, 260Z, 280Z Performance / Technical 11-06-2015, 06:55 PM
Replies: 3
Views: 517
Posted By jalexquijano
Thanks just found the screws taking both halves...

Thanks just found the screws taking both halves to a tool shop
Forum: 240Z, 260Z, 280Z Performance / Technical 10-26-2015, 07:26 PM
Replies: 3
Views: 517
Posted By jalexquijano
1972 240z steering column cover screw type and size

Does anyone know where can i get the complete steering column cover halves with their 6 screws? I tried MSA but they do not supply the screws? If not what is the correct size and type of screws? M4...
Forum: 240Z, 260Z, 280Z Performance / Technical 07-29-2015, 09:10 AM
Replies: 3
Views: 731
Posted By jalexquijano
Okay. I use to have a 1959 vw beetle which used...

Okay. I use to have a 1959 vw beetle which used drum brakes on all 4 wheels and you could stop the car when running while pulling the ebrake. Its weird i cannot do this in my 240z.
Forum: Wanted (WTB / WTT) 07-29-2015, 09:08 AM
Replies: 2
Views: 448
Posted By jalexquijano
Please check your email, I sent your the...

Please check your email, I sent your the pictures. I need these part urgently! I thought it was easier to intall an AC system in this vehicle. Now it comes that you need all these parts!
Forum: Wanted (WTB / WTT) 07-28-2015, 11:02 AM
Replies: 2
Views: 448
Posted By jalexquijano
WTB Urgently Throttle Opener Valve and Servo Diaphgram for 1972 240z

Getting ready to install a Vintage Air gen II mini evaporator kit and Sanden Compressor 508. However, i am still missing a fully working throttle opener valve and servo diaphgram to raise the idle...
Forum: 240Z, 260Z, 280Z Performance / Technical 07-15-2015, 07:53 PM
Replies: 3
Views: 731
Posted By jalexquijano
How fast should my 240z stop just by pulling the e-brake

I have tried stopping my 240z with the emergency brake with no success. Does the ebrake in this car only Works to lock the car when its parked?? really weird! anyone? i tried pulling hard and it...
Forum: 240Z, 260Z, 280Z Performance / Technical 07-07-2015, 05:31 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Problem solved! Carburetors were not tuned...

Problem solved! Carburetors were not tuned properly, too much gasoline! Car is idling fine and no hesitation!

Thanks i found a good old school mechanic!
Forum: 240Z, 260Z, 280Z Performance / Technical 07-07-2015, 05:29 PM
Replies: 0
Views: 429
Posted By jalexquijano
looking for air box filter gaskets (3) for 1972 240z

Anyone knows where to get the 3 air box filter gaskets that fit inside and around the air box on a 1972 240z?
Forum: 240Z, 260Z, 280Z Performance / Technical 06-10-2015, 07:49 AM
Replies: 8
Views: 1,874
Posted By jalexquijano
Sorry, but i did clean out all that emission anti...

Sorry, but i did clean out all that emission anti backfire valves that were placed on top of the balance tube! THis is a picture of how it is right now!
Forum: 240Z, 260Z, 280Z Performance / Technical 06-09-2015, 10:30 AM
Replies: 8
Views: 1,874
Posted By jalexquijano
Back and Forth jumpy / Hopping acceleration at 1st and 2nd gear!!

My 1972 240z with dual SU carburetors recently remanufactured by Ztherapy and Schneider 274F cam with new valve springs, rocker arms and lashpads is presenting a jumpy hesitation at 1st and 2nd gear....
Forum: 240Z, 260Z, 280Z Performance / Technical 04-30-2015, 09:54 AM
Replies: 8
Views: 1,874
Posted By jalexquijano
Rough Idle!!! Really annoying!!!

I have a disgusting Rough Idle problem with my 1972 240z.


The car Idle is set up at 950 rpm (Shneider 274 F Cam, Pertronix ignitor and ignition coil, remanufactured SU carbs from Ztherapy and...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-25-2015, 05:47 AM
Replies: 27
Views: 3,208
Posted By jalexquijano
I bypassed the ballast resistor by adding a wire...

I bypassed the ballast resistor by adding a wire accross it! I did also measure the voltage of the Ignition coil with a multimeter. It is measuring 3.8 to 4 volts with the car engine on at idle. The...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-24-2015, 12:57 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Stock coil??? I do not have the stock coil. This...

Stock coil??? I do not have the stock coil. This is a Pertronix 3.0 ohms coil.

By the way, Is the Pertronix 91761 Ignitor II any real improvement (45,000 v) for a 1972 240z? I read it is used with...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-22-2015, 09:11 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
I have the pertronix ignitor installed at the...

I have the pertronix ignitor installed at the distribuitor. Have seen so many different opinions on removing or leaving the ballast resistor in place with a 3.0 ohms, that i cannot make up my mind...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-20-2015, 06:55 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Bypass with alligator clips??? Are you sure i...

Bypass with alligator clips??? Are you sure i wont damage or cause any damage to the car? My car is a 1972 240z made in January 1972
Forum: 240Z, 260Z, 280Z Performance / Technical 04-20-2015, 03:20 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Could this be the solution to my idling problem....

Could this be the solution to my idling problem. I read that if i take it out of the equation i will have erratic Readings in the Tachometer (RPMS) or the coil will get too hot.

Please advise how...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-20-2015, 02:14 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Problem partly solved. The valve where not...

Problem partly solved. The valve where not adjusted to .008 and .010. Now the hesitation problem is solved. However, the car keeps having a rough idle after kept idling either at the parking garage...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-15-2015, 04:00 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Just did a compression test on the cylinders and...

Just did a compression test on the cylinders and a fuel pressure test.

The compression test drew the following results:

Cylinder 1 : 180 PSI

Cylinder 2: 180 PSI

Cylinder 3: 185 PSI
Forum: 240Z, 260Z, 280Z Performance / Technical 04-11-2015, 07:28 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Well today he adjusted them at .09 and .10 using...

Well today he adjusted them at .09 and .10 using feeler gauges. My mechanic found the valve too tights and even though he manage to set them at 0.9 and .10, the car is still presenting the back and...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-02-2015, 01:38 PM
Replies: 27
Views: 3,208
Posted By jalexquijano
Valve and time adjustment clearances on a Shneider 274F Camshaft

Got an old school mechanic who came to my house today and inspect the car. After lifting the valve cover, He found out that the engine valves were too tight and will need to adjust them all. He did...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-01-2015, 07:59 AM
Replies: 1
Views: 1,930
Posted By jalexquijano
NGK BPR6ES-11 vs BP6ES-11

Is there any real difference between NGK BPR6ES-11 and BP6ES-11?


My 240z has a petronix ignitor installed and sometimes gives me hassles with the current BP6ES which advertise as pre-gapped.
...
Forum: 240Z, 260Z, 280Z Performance / Technical 04-01-2015, 07:59 AM
Replies: 8
Views: 1,874
Posted By jalexquijano
Do you have a picture of this actuator?

Do you have a picture of this actuator?
Forum: 240Z, 260Z, 280Z Performance / Technical 03-30-2015, 02:19 PM
Replies: 5
Views: 878
Posted By jalexquijano
I am at sea level. I will have the exhaust...

I am at sea level. I will have the exhaust checked anyway as i believe the backfire popping was not coming from the carb intake but from the manifold to exhaust intake.

What will be the perfect...
Forum: 240Z, 260Z, 280Z Performance / Technical 03-29-2015, 07:40 PM
Replies: 5
Views: 878
Posted By jalexquijano
Well i managed to fix the problem by pulling each...

Well i managed to fix the problem by pulling each of the NGK BP6ES spark plugs, cleaning them with a wire brush and electronic contact cleaner, spraying contact cleaner to each of the terminals of...
Forum: 240Z, 260Z, 280Z Performance / Technical 03-29-2015, 07:03 AM
Replies: 5
Views: 878
Posted By jalexquijano
Non stable Idling and sudden engine shut off on my 240z

Recently installed a Schneider 274F cam, with new valve springs, lashpads and rocker arms. I also sent my round top Hitachi SU carbs for a complete remanufacture to Bruce Palmer at ZTherapy. He did...
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