Very sick 94 Olds 88 Royale - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-24-2005, 01:47 PM   #21
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Quote:
Originally Posted by mkaake
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Are they absolutely sure that you do not have a bad coil?

Do a small test ans swap the coils from the 99, and see if that makes any diffrence at all..

Its free and worth a shot, will only cost you a few minutes...

And on top of that, if the PCM would not talk to the Tech II, shouldn't they have used a Tech I? This is an OBDI car with an OBD2 connector if memory serves...

But anyhoe try swaping the coils from the 99 and see if it makes any diffrence..
just an FYI - they can hook the tech2 up to just about anything. the one I used to use was programmed for 92-06 vehicles. you just need the right cable, and it'll take care of the rest...
Wasn't 100% sure on that one....

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Old 08-24-2005, 01:57 PM   #22
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Quote:
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vital, have you tried running the motor with the tranny in neutral?
Yes, and it runs just as poorly in Neutral as it does in Park, Drive, 3, 2, or 1.
Well that pretty well sucks. Have you tried running open exhaust?

If so, the next thing I'd try is pulling the plugs, and see what kind of arc you get across them while turning the engine over (ground it to the block, and don't hold it with bare hands ).
Funny you mention that...after I swap the PCM tomorrow (and if things aren't any better), I was going to unbolt the cat convertor downpipe from the exhaust manifold and see how she does.

Not sure what kind of arc I'm getting. I do have new plugs and wires installed on the car. I've also swapped the ICM and coils from the 99.

I watched it with a timing light, too, and they're all firing.

I'll try what you suggested.
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Old 08-24-2005, 02:00 PM   #23
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Well darnit, why can't you make this an easy to solve problem??

Anyhew, once you try the open exhaust, we'll see where we can go from there...
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Old 08-24-2005, 02:08 PM   #24
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I agree....

The plugs and wires and I used are AC Delcos.... Tried to keep everything bone stock.
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Old 08-24-2005, 02:17 PM   #25
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Good for you

Anyhew, at this point, I'd lean towards some sort of exaust restriction... you've got your compression, ignition, and fuel...
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Old 08-24-2005, 03:30 PM   #26
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Quote:
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Good for you

Anyhew, at this point, I'd lean towards some sort of exaust restriction... you've got your compression, ignition, and fuel...
Would the catalytic convertor always rattle when it'* bad? Currently, the one on the car doesn't rattle.
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Old 08-24-2005, 03:35 PM   #27
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Quote:
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Good for you

Anyhew, at this point, I'd lean towards some sort of exaust restriction... you've got your compression, ignition, and fuel...
Would the catalytic convertor always rattle when it'* bad? Currently, the one on the car doesn't rattle.
Nope, sometimes they just get clogged... I have seen a few do that... I have seen a few rattle as well.... Sometimes they do sometimes they don't...

when you were driving the car, did there exahust hiss like mad? I have seen times where the converter was plugged bad enough that it actually cause the engine to overheat...

I drove a Friends minivan, because he could not figure out what was wrong with it... I drove it around tha block and at 3000 Rpms it would hiss up a storm and have no power... I told him what it was and he fixed it.... Ran like hell after that...

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Old 08-24-2005, 03:50 PM   #28
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yeah, I've seen a few that didn't rattle, but were bad... actually, one of my best friends had that very problem, now that you mention it. Don't know why I didn't think of it before... but he ended up hollowing out his cat (I know, I know. I'd never do it either) and it ran great.
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Old 08-24-2005, 03:53 PM   #29
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There'* no hissing. I have a feeling if there was hissing that it would be a cough, hiss, cough, hiss, cough, hiss!

You bring another very good point... The car runs hot. No doubt about it. It will easily run at 225 or so. I does have a 180 stat in it. It'* not low on coolant or have a weak pump either...they've both been recently changed. The fans kick on very quickly after the car'* started, too.

Also when idling the exhaust system shakes like made. Just vibrates back and forth...and it'* a good, vigorous vibration!!

If I pulled the O2 sensor do you think it would give clues if I have a restricted exhaust?
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Old 08-24-2005, 04:18 PM   #30
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It might, but in my experience with the h'*, it would be less of a pain to disconnect the downpipe... my O2 was pretty stinkin stuck...
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