Q&A

Hello I have no spark at all at the distributor on 1 and 2 terminals ..3 and 4 fire 1 and 2 are dead from the cap.. 1992 Chevy s 10 2.5L 4 cly 2 wd Installed a rebuilt Dist. and still the same

Does the engine start and try to run on two cylinders? If the cap and rotor are not busted and installed
correctly i think it is impossible for two cylinders not to fire FROM THE DIST. CAP when the other two do fire.
Especially with all the parts you have installed. How are you checking for fire?

yes it does.. I'm returning the distrubitor.. it my be defective..

I changed the cap twice the firing went from 2 and 3 to 3 and 4 no number one or 2 this time..

Diagnosis is 1 and 2 cylinder not firing..

Good luck hope you get it fixed!

I changed the Distributor and now all cylinders are firing.. the rebuilt was defective... now it still runs rough.. What does the anti knock sensor do.?/ and the engine management computer do??