AboutJerry Schwell Expertise Most anything about SAAB 900's 1990 and earlier, except for automatic transmission info. Also, I have lotsa vintage parts.
Experience I have rebuilt many dozens of SAABS, from 1970's to 1990's.
Education/Credentials BSEE grad work in electronics and underwater acoustics.
Expert: Jerry Schwell Date: 5/28/2008 Subject: saab 900 89 model
Question QUESTION: it started off with car running for distances then shutting down. then it has gotten more frequent until it will not crank at all. fuel pump and relays check out okay. engine will turn over but not fire
ANSWER: Jack:
You did not say whether you checked for spark. Also, did you check for "fuel flow" or just "fuel pump running noise". My first guess, in order of likelihood, is a clogged fuel filter, hence the need for a "fuel flow" test. Next I would check for spark, in particular for a "grounded rotor". This is when the rotor (inside the distributor cap) develops a short circuit to ground...and can be detected by "sniffing" the "hole" of the rotor for a "burnt" smell.
After these two simple tests, the field of possibilities "widens", but at least you'll know whether fuel or spark are to blame.
Hope this helps,
Jerry
---------- FOLLOW-UP ----------
QUESTION: I am getting fuel flow and good spark to the plugs,engine turns over strong just not cranking.
Answer Uh-oh: Sounds like it is more complicated ($$$).
You'll need to check compression; if incorrect (not between 130-160 psi) the two most likely sources of the problem are: a. (slipped timing chain) or b. (bad head gasket).
Both are quite extensive fixes.
