Rev problem on '82zx

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May 23, 2004 | 07:15 AM

Sparkey

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Posts: n/a

Rev problem on '82zx

I just inherited a ’82 zx from my father. It was running great when it was parked 2 years ago… Sure enough I stuck in the key and it started right up. The only problem seems to be when revving up the engine. When I rev the engine up it will shut off around 2800 rpm's and then restart when the rpm’s drop down below 2000. It’s almost like a rev limiter is set too low. I know the gas is old and it probably needs a fuel filter but the behavior is strange and I would not normally relate it to old gas… Unless it is starving for fuel above 2800 rpm’s. Any suggestions????

May 23, 2004 | 09:38 AM

lifegrddude

Externally Wastegated

Joined: Oct 2001

Posts: 1,220

From: San Diego

It probably is the gas. If it's been sitting for 2 years, drop the fuel tank and check it to see if it has rusted at all. The gas will most likely be varnish too so it'd be best to get rid of it and put fresh gas in there before it clogs up the fuel system.
John 82ZXT

May 23, 2004 | 01:43 PM

FastZ

Registered User

Joined: Aug 2002

Posts: 150

From: Maryville, TN

Unplug and plug in the ecu like 4-5 times. My freinds $100.00 turbo had this same problem and nobody could figure it out. Try that. Hope it works.

May 23, 2004 | 06:35 PM

hellzbellz83t

Registered User

Joined: Mar 2002

Posts: 116

From: Tennessee

Quote:

Originally Posted by FastZ

Unplug and plug in the ecu like 4-5 times. My freinds $100.00 turbo had this same problem and nobody could figure it out. Try that. Hope it works.

I've got a friend whose Honda sat for a few months then did the same thing. I suggested resetting the computer just as a guess because nothing else was working. Lo and behold! That was the ticket! Try it, maybe you'll get as lucky as we did.
-Kel

May 24, 2004 | 08:06 AM

Bleach

The Evil Twin

Joined: Mar 2001

Posts: 9,297

From: Seattle, WA

That is a common problem that is usually associated with water in your throttle position switch. (or the switch could be bad) On the side of the throttle body, there is a small black box with a plug on top. Take the plug off and clean it with WD-40, and then let it dry. Plug it back in and you should be fine. I just ran into this problem this weekend after I washed a 280Z engine. Happens every time. It took a couple trys of cleaning and drying the plug before it worked properly.