[Subscribe to Daily Digest] |
Members do not see ads below this line. - Help Keep This Site Online - Signup
As some may have read here, I cracked a piston in my 99 Viggen (stock). I have owned this car for a week and a half and it has 75000 miles. I got on the highway under boost in 3rd gear, probably not full throttle, but near to it. The boost level rose to near maximum (I get 1.4bar), then tapered back to around 1.1bar- which is presumably typical? I got off the highway half a mile later, smelled oil, and the car was running on 3 cylinders. I heard no pinging on the on-ramp, but I had the windows up and the A/C on. I had it towed home and pulled the plugs. 2-4 looked very rich, but otherwise OK, #1 was covered in oil, and the cylinder had a big black mess in it. I had it towed to the dealer today on the unlikely chance that they find sludge.
When I get the car back together, I obviously don't want this to happen again. If it is in my control, I plan to use B234 components for strength.
I have read here, as well as spoken with some informed Saab enthusiasts, that there is some speculation of the MAF signal tolerance zone extending to the lean end. This would explain the engine failure, but even if it is not the case, I plan to isolate this variable. I have access to an o-scope, and a Saab wrecker, so I plan to borrow a few MAFs when the car is running again to find the "safest" MAF. What would be the best way to go about testing the MAFs? I will have an electric boost gauge, but will I also need an A/F reading? Is there enough variance from one WOT pull to the next on the road to discredit any distinction in the o-scope results? Or do I need to buck up for a dyno session?
Is it likely that a guy like me with a home garage and an engine hoist could get the engine out of this car? I had no trouble with the task on a Honda Civic.
Thanks,
Andy
posted by 67.173.2...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
