KnightStang

I Have a 1995 Mustang GT 5.0. I have changed the cap and rotor, wires and plugs. I changed all 8 injectors, spark plugs and tested the compression on all cylinders. I cannot seem to find the problem with the #1 cylinder, any tips or suggestions will help...thanks!

mjr46

how do you know cylinder 1 is misfiring??

KnightStang

I took it to the shop to have diagnostics done on it and they said it was the #1 cylinder!

mjr46

hmmmm, I'd like to know what they used to determine such...?? what is the car doing??? running rough??

KnightStang

yeah, idles a little rough and a little more so, when holding the brake in drive...while running, i pulled the #1 plug wire off the cap and and nothing changed, it should run rougher, if i pull the #1 wire off right, it stay the same.

mjr46

try that with another cylinder and see if it changes.........if so then go back to no 1 and check for spark at the end of the plug wire with a spark tester, if it has such then check plug, if that's good, you said you did a compression test on that cylinder.....what was compression result??? also with a noid light make sure the inj on that cylinder is pulsing, if it does the wiring is good to inj

88GTBLACK

+1 pull the plug and check if its sparking and see if the plug is wet or dry make sure the injector pulse is alright and the injector is working, and do a compression test on that cyl. But if the shop diagnosed it as a dead miss ask them why they believe its missing see if theyve already covered that stuff. It will help us help you fix your problem

mjr46

also why didn't the shop go any further with the diagnosis??

KnightStang

i was outside looking for the problem and i started to test the injector for voltage and in the process i found the broken wire close to the injector harness!

mjr46

see.......I was right on what to test