Re: 16 valve conversion (long) - Saabnet.com Bulletin Board
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Re: 16 valve conversion (long)
Posted by Justin VanAbrahams [Email] (more from Justin VanAbrahams) on Mon, 20 Mar 2017 09:58:18

In Reply to: Re: 16 valve conversion (long), Dan Hay, Mon, 20 Mar 2017 06:34:39
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Good to know he did LH and it appears he properly converted the ignition system, so at least you have a good starting point.

Poor power and random stalling could be related, but they aren't necessarily. The fact that this guy said he tried multiple MAFs and only one would work is suspect - that really shouldn't be a consideration here unless something else is wrong. It'd be my suspicion that there is a larger problem and the MAF that worked is maybe either the least broken or most broken, and it's masking other problems.

When it stalls, does it sputter and die or just cut off? Does it die will driving, while idling, or while changing gears? Some other scenario? Do you know if the donor parts all came together from a running car, or did the mechanic piece them together from various sources? Was anything done to the engine between where it was and where it is?

If you think the engine was '87-'89, then I'm going to guess it's running LH 2.2 so that limits your ability to diagnose issues electronically, so you'll have to do it the old fashioned way. I would start with a *thorough* inspection for vacuum leaks, as they will cause all of these issues. I would check the ignition timing for sure, as well as fuel pressure. If you don't have a history on the motor, I'd check compression too - Saab motors are darned reliable, and I think a lot of people take for granted they'll be in good shape, but IMHO it'd be better to know for sure.

There are a lot of boxes to check here, but honestly it shouldn't be difficult to get it sorted.


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