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-   -   misses and stumbles (https://www.camaroz28.com/forums/lt1-based-engine-tech-9/misses-stumbles-359450/)

nmemry3 Apr 18, 2005 11:43 AM

misses and stumbles
 
hello new member here i have a 94 Z-28 lt-1 auto runs real rough when you start it misses real bad new coil plugs wires fuel pressue is perfect exhaust pipes are real black car runs rough like i said but if you stomp on it it goes strong but misses and back fires a little ive been tracking this problem for a while please help pleaaaaaassee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

biltLT1 Apr 18, 2005 11:51 AM

Re: misses and stumbles
 
Optispark

nmemry3 Apr 18, 2005 02:01 PM

Re: misses and stumbles
 
i was thinking that to thx

blaze309 Apr 18, 2005 04:08 PM

Re: misses and stumbles
 
Seriously i wouldnt got replacing opti-spark right away. I SEE WAY TO MANY people blaming everything on the opti. I have a problem similiar to your's, i'm going to explain my problem to you so you can see if your's seems simliar. When i start up my car no matter if it is warm or cold at idle my car will sit there and shake and i can notice the rpm's dropping a tad. When i'm driving and trying to maintain a speed it'll start stumbling really bad and the car will start shaking. This is defintly noticable when you try to go up a hill, and even more so when you go up a hill in 5th or 6th. When i go wot it seems to clear up more-so than just cruising but the car just doesnt pull like it use to. Well a few days ago i tried some fuel injector cleaner, and a day or two after that my car got noticably better, i mean a whole lot it was actaully not annoying to drive anymore. The problem still isnt completly gone but i'm going to run some seafoam through my car. And if i let my car sit for a day or so without running the next time i start it, it'll be missing really bad but with that injector cleaner it seems to clear up after about 10 minutes. I would try some fuel injector cleaner first since it's cheap, and also a fuel filter. Also at night you can start your car and look under the hood and see if you see any wires arcing.

nmemry3 Apr 18, 2005 09:07 PM

Re: misses and stumbles
 
i tried fuel injector cleaner did not help the new wires seem to make it a bit better but still runs real bad

nmemry3 Apr 20, 2005 01:37 PM

Re: misses and stumbles
 
thanks for the help it was the optispark it had a big hole burnt thru the back and the rotor was loose put some seafoam in it its running real strong thanks again

keng Apr 21, 2005 04:27 PM

Re: misses and stumbles
 
HOw hard was it to pull the opti

BLinindoll Apr 21, 2005 05:12 PM

Re: misses and stumbles
 
Gotta pull the fans, coil, air pump, water pump, and crankshaft balancer pully. Fun stuff. :D


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