Dead cylinder

[gpse3400]

Developed a misfire.... cylinder #4... Swapped coils and DIS module and no avail. #4 wire is firing....Thinking the injector is clogged....I did a leak down test on the injectors as it seem to drop the pressure the same as all the others....compression test checks out....no doubt my engine is probably ready for the YARDE.... All cylinders are combusting but #4. Input apprieciated....

[Dave96z34]

Last time that hapend I changed wires and it never came back. Check your plug gaps.

[gpse3400]

I know i flipped the wires around but i dont think it did anything..plus its cold out..i'll try again in the morning. Wire are kinda expensive and i have acdelco wires....I assume they have a lifetime warrenty? $120 i hope they do...

[Dave96z34]

Make sure you use dielectric grease and check the boot terminals for burning or them being bent to wide.

[jb88ci]

I got a set of nib delco 7mm or 7.7mm, something like that, off ebay for abou 40 bucks....I also had a miss. It was the wires, heat had broken them down and they were 'leaking' the spark...

[gpse3400]

Fuel injector was bad. 2 on the front wer 13 ohms and the center one which was the one in question was 8 ohms. car runs fine but I got a bug in me to go and pll the upper intake and check the rears now...

[IsaacHayes]

Ohm em out! When I had mine out I checked them and all were 12.5 IIRC something except one which was a few tenths different.

[gpse3400]

All injectors check out, also checked the rear compression 180 on the rear. gonna retest the fronts...other than my IAC shorting out all seem well. gotta reseal the pcv system...will update how it runs

[gpse3400]

re checked the fronts all is at 180. I guess i didnt have the hose screwed in tight enough.Car runs fine includeing more power and economy!! But my IAC has shorted out. Between the injector and that I think these two parts have been decaying for a long while and I have never noticed it.....