Ok, this is hard to explain, lets say I warm the engine up and then take it for a ride, it drives fine when not beating on it, then lets say I want to go fast, It sounds like its hitting fuel cut off at low RPM, it skips and misfires as its climbing through the RPM's, it stops this after a longer time of driving, but it sounds as if i'm not getting spark, not getting fuel, or the timing is off, which it shouldnt be since I never messed with it yet.

if anyone knows what could be causing this, let me know. thanks.

B18A1 in EG sedan Using 90-93 Teg ECU

It never did this before, just started happening with the colder weather coming and going.

 

one thing to do is check your plugs.
and it's always good to check your timing.

 

basic stuff plugs,cap,rotor fuel filter etc start simple its usually is

 

yea tune up makes a big difference.
also check ur air filter

 

All these things minus the fuel filter were checked, I just replaced the cap with a new one.

Its still wierd that it does this only when the car warms up a bit, when its been running for a longer time it dosnt do it anymore.

 

whats the plug gap at?

 

Gapped correctly according to the 90-93 teg manual, I forget what the number was, but I gapped them when I put new plugs in. ran fine.
Update, Today it wasnt doing it as often as it usually does, its wierd.

 

so.. what you're saying is it rungs fine until you give it WOT and then it starts to stumble and misfire?

what if you slowly increase the throttle position and get the revs up?

lets think about what happens @ wot, what changes.

1. the ecu ignores the o2 sensor and uses hard coded maps.
2. the low / 0 vac causes the fpr to up the fuel pressure.

check the vac line to the fpr ?

 

Martin. Did you ever replace the ignitor. I could be on it's last leg.

 

u have an eg 4door with an ls motor? and a 90-93 teg ecu? hope its not one of the 90-91 or else it wouldn't even plug in =x jp im sure u already knew that. i think its ur dizzy...