Quote:
Originally Posted by mlotruglio
My shop manual and parts book say that is the altitude sensor. Im going to have to look deeper in that. I have no lights, and it never really goes away Full power and Normal Power both miss, I have not heard it at idle ( cant feel it) Dont think so though Hot cold same The exhuast smells right. As far as a scan tool I have a obd 2 but That dose not help me.
Its really stumping me   |
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.