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Yes, but Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Thu, 21 Dec 2000 14:32:10
In Reply to: Help! Are Saab engines interference type engines? 88t (long), Jan Hammer, Thu, 21 Dec 2000 13:10:00 Members do not see ads below this line. - Help Keep This Site Online - Signup |
They are interference engines, but it would take a lot more than being off one tooth for a valve to hit a piston. You'd have had to jump a lot of teeth.
Without pulling the valve cover (a very easy job, but why do it if you don't have to?) try these tricks-
Pull spark plug number one, and turn the engine over by hand until you see the piston come as far up as it will go. I usually just stick a long wooden dowel into the spark plug hole, put the car in 5th gear on a flat surface, and push on the bumper. When the dowel *just* starts to move back down, you're just a sqoosh past Top Dead Center. Use something real long so it won't fall into the cylinder (bad move!), and soft like wood so it won't scratch.
Next, pull off the distributor cap, and see if the rotor is pointing towards the connection for cylinder #1. If not, then your distributor has shifted (most likely), or that particular cam jumped a bunch of teeth (not likely, but could be). I've had distributors shift position on me in the past, not on a Saab, and after an impact (OK, I caught air jumping some RR tracks), but it could happen.
Other questions - crank the engine a bit, then immediately pull a spark plug. It should be wet with gas, or at least stink of fuel. I know that you have fuel at the fuel rail, but getting it through the injectors to the cylinders is what counts. Have you checked the connector to the ECU? (I believe it is in the passenger side footwell on the outside, behind the carpet). Perhaps it is as simple as the connector came off, or a fuse blew, and the ECU isn't signalling the injectors to open. Heck, do some wiring checks to make sure the injectors have a ground return, and get a turn on signal. It'snot a very long pulse - and it may be tricky, depending on what equipment you have. Get yourself a logic probe from Radio shack for about $15 to check for short pulses.
, Thu, 21 Dec 2000 14:32:10 <-- Viewing This Message
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