Yes I bought her after her long "nap". My scan tool is a $300 advance auto cheepie so I can rule that out!!(
) There were no mice or anything like that so I can rule that out also. A friend of mine found a way to test the injector coils with out pulling the plunum so Im going to try that and I am deff going to pull the plugs and see if I can get any clues there. Im also going to trow in a twist now to Before I filled up that other day I added a bottle of octane booster($2 for kicks and giggles) she had about 2-3 gallons left and It was almost perfect. soooo IDK. Tomarrow I will pull the plugs, and if I have time I will run the injector coil test.
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Originally Posted by tomtom72
I would try looking at the plugs to see if they have anything to tell you. Also, refrain from removing a plug wire one at a time while the motor is running as the DIS box doesn't like that too much and you could damage it eventually.
On the scan tool, if you have a rather good one most offer an adapter. This adapter is a two sided connector that plugs into the OBDII connector already on the machine and it has an ODBI pattern so it can plug into an OBDI ALDL socket in the car. The only rub is you need the software for your yr Z and then you can run diagnostics. Do you by chance have a snap-on MT-2500? If yes I could lend you my software ( I'll have to check if it goes to 91 ) and my OBDII to OBDI adapter plug.
Okay, I should read more carefully!  Since the miss is constant in either full or normal, and you have no SES light ( even briefly like it's winking at you ) and you changed the coils & wires & plugs and the exhaust doesn't smell lean or rich.....the work that was done was done after it sat for two yrs: plugs, wires & coils? You didn't notice any evidence of mice chewing any of the under plenum wiring? Did you notice any chaffing of the injector harness at the injectors ( one of our brothers found a chafed injector wire that got pinched when he put the plenum back on ) or any carbon tracking on the coil mounting block or anything out of the ordinary under there? You got that vacuum line plugged in at the lower right side of the throttle body? I'm just thinking out loud here, sorry.
Look at the plugs first as Tyler said and then do the spark quality test as Jerry said. |