abcsgarage

At about wits end with this motor. So it misses when the tach jumps around, it seems to be an intermittent problem. It however seems to be getting worse. Heres a Video:



Ignitor is good tried two of them same result
New Dizzy with CAS
Checked CHTS
Brand new cap, rotor, plugs, and wires
Tried two coils both gave same results
Ive checked all my grounds and even sanded them all and made sure they were solid. Spent a lot of time going through my harness making sure things were not out of place

Im trying to see if anyone else has had this problem before. I couldnt find any info on this.
This is my second ecu, This could potentialy be the problem, however I will look more into it when I get home from work.

Thanks

NismoPick

Since you were revving the motor, I can't tell what the problem is in that video...

Have you checked your TPS & AFM?

noboosts130

Double check your connections for the spark plug wires, both at the cap and plugs. I had a Formula Firebird act the same way. I couldn't figure it out til the plug wire fell off the plug, and the Formula had just been tuned up at a shop.

abcsgarage

Nismo as I stated it seems to be intermittent, at that moment reving it to 2k seemed to get it to do it the most. When I rev it, it seems to go away. Yes the tps is fine I have played with that and no change. The AFM was open and majorly played with by the previous owner. Until this problem started I had it at a decent point.

Okay I will take a look no boost.

thanks

FricFrac

Sounds like a possible dead spot on the AFM pot. Check the connectors as well as that's a common failure point

abcsgarage

Well I've gone over the plug wires many times, and even swapped afms to see if that was the problem. It gave me no change.

Today at work I thought more on what it could be, I remember that the previous owner stated that he replaced the injector clips. Could a bad connection at the injectors give me this kind of problem? Or even a bad injector in its self?

Thanks again.