HighDesertRacecraft

I have a problem with my 88' GXL, no spark at the plugs.

1. Good compression , checked out fine.
2. Fuel is there
3. No spark at any plug wire
4. CAS off running car swapped, on both, and my unit ran my 87's as well, but the donors didnt make a difference on the 88'.
5. Battery is full charge, good connections and cranks nice and strong like normal.
6. ALL main fuses in underhood junction are good and replaced for proper seating.
7. Kick panel fuses checked out fine.
8. Shift Light stays on as soon as key is on, not running. My other runner doesnt.
9. Tach Does not bounce like my 87 eitherl.... the other bounces about 50rpm a few times and then starts up... I see spark on the runner but not my 88' GXL!

Any solid info would be great, the car ran fine but something electrical seemed to eat me up.... I didnt want to swap ECU's with my 87 as I know of the impedence change in the injectors and such.... Thanks!

powrdby13B

definitely sounds like a wiring problem... if the tach don't bounce when you turn it over, then you know it's not a problem with the coils or plugs I spose... I can't help you for sure, but I can give you some insight - if you pull the EGI fuse, that is what happens. Keep that in mind... and check the ECU for codes (although I think that cuts off fuel).

Icemark

If the tach is working at all then you are getting trailing spark. It runs off of the trailing coils.

powrdby13B

i thought in s5's the tach was somehow wired so that unless both coils failed simultaneously it would still work?

EDIT: it's not an s5... my mistake... ummm... see if there's power to the trailing coil...

therotaryrocket

so if your tach isn't working then i guess your trailing ignition isn't either. the shift up light illuminates in my turbo II with the ignition switch on, engine off. how did you check the fuses? even if the fuses look good they should be checked with a multimeter or a test light or something to check continuity. how did you check for spark at the plugs?

therotaryrocket

wouldn't the car still run without trailing? my 12a would.

HAILERS

Please install a new ENGINE fuse..........was my first thought til I notice you say you have fuel. Check it out anyway, the engine fuse in the interior fuse box.

If it is good, then take that extra cas and attach that cas to the bad car's harness. Turn the key to ON. Spin the cas's gear quickly with your fingers. If you have taken one of the wires out of the LEAD COILS bore, and just rested it at the top of the bore, then as you spin the cas's gear you should see a violent sparking condition.

If you don't see a spark, then take a meter and check the brown/white wire at the boost sensor to see if you have approx 5vdc on that wire. That will give you an idea if the ECU has a reference voltage or not. No ref voltage.....no start.

Before doing that put a meter on the LEAD coils black/yellow wire and see if it has 12vdc. That black/yellow wire is in the small, white, two socket plug at the coils. DO NOT worry or dick with the other wire in that connector.

Whatever you do, do that part using a spare cas. It's a convincer one way or the other.

HAILERS

Shift up light on? That means that your NEUTRAL switch is either bad or disconnected. The way I understand things is that that item is not operable unless your out of neutral.

Getting a shiftup light in fifth gear is another animal. Usually means the fifth gear or over the top switch is corrupt.

got_boost

iTrader: (16)

is there a way to get it to stop , on mine , the previous owner did the automatic/manual tranny swap , and the "shift up" light often appears, and the check engine light too is on ( on the cluster ,only the speedo is not plugged )... but the car runs fine, i did a 5 hours trip with the car as soon as i got it ( Hamilton,Ontario to Montreal, Quebec, i did one 15 minutes stop. and the Temperature never moved the highest it went is a bit lower then half ...

HAILERS

If it's a intermittent thing, like in one of my cars, try holding the shift lever to the fwd/right position while driving. My light will disappear and not come back for quite a while. It's something I don't care to fix. It just does not bother me enough.

I have a series four. They don't have check engine lights. You need to interrogate the thing and find out what is causing the check engine light.

Connect the speedometer cable

I'm pretty sure the neutral sw and the fifth gear switch work as I wrote above......but I'm really not that sure. I think I'll go read the book to make sure. Anyway, next time the shift light comes on, grab the shift lever and hold it firmly to the fwd/right and see if the light stays off.

HighDesertRacecraft

Right under the trailing coils there was a connector that was magically apart... Plugged it up and tach bounced and it started right away... very exciting to be something so silly, lol.

Thanks