driveability issues

[Scott]

Drew kindly scanned this at one point:

http://www.saabrally.com/downloads/SAAB_99_D-Jetronic.pdf

For what its worth, i left points behind and run a crane cams electronic ignition, which i have been super happy with.

I hate to throw out guesses, but are you comfortable the throttle control switch is good? Seems like i've had odd issues when one of those goes bad.

Good luck.

[99Super]

is the mpc the large pod with the vacuum line? not the small 2 wire in the intake .... did I mention I have that unplugged , seems to run better

I think you found your problem. That is the MPC. For sure the Achilles heel of the system. The 2-wire on the intake is the IAT sensor.
Use the manual and check your resistances. I don't think the distributor is your problem.

John

[saabfan9]

I'LL go out to the garage tonight and do the resistance tests... as she sits the timing does not jive (I wouldn't even think she would run at all with the setting) what do you suppose I should do about the timing? ... thanks for the help guys

[saabfan9]

well you guys called it...mpc looks to be bad pins 7 & 15 good with about 92 ohms but 8 & 10 reads open....still can't explain the timing issue but I guess 1 thing at a time

next question anyone know where I can find one or have one they could part with?

[saabfan9]

ok I see a few on feebay a little pricey ....am I open to use one from a different make (vw-porsche-volvo) they look the same and work with the d-jet right? thanks for the help guys

[squaab99t]

ok I see a few on feebay a little pricey but can you do....am I open to use one from a different make (vw-porsche-volvo) they look the same and work with the d-jet right? thanks for the help guys

What part are you looking for? I had a '74 with D jet. Totaled out but I kept some of the parts. Post a pix and I can look in the D jet box to see.

[saabfan9]

http://img224.imageshack.us/img224/9359 ... 3254in.jpg

[saabfan9]

he would have sat on the drivers inner fender well with a vacuum line from the intake attached.... appreciate the help, took mine apart last night I now have a car that doesn't run

[squaab99t]

he would have sat on the drivers inner fender well with a vacuum line from the intake attached.... appreciate the help, took mine apart last night I now have a car that doesn't run

Might be in luck I think I saved that. The car was rear ended so the fuel injection was working at the time. We even fired it up and drug it ass down the road to put it in public street park.
I'll look tonight.

[saabfan9]

thank you very much

[squaab99t]

he would have sat on the drivers inner fender well with a vacuum line from the intake attached.... appreciate the help, took mine apart last night I now have a car that doesn't run

Might be in luck I think I saved that. The car was rear ended so the fuel injection was working at the time. We even fired it up and drug it ass down the road to put it in public street park.
I'll look tonight.

Christmas in July...
In the very last crate/time capsule 40 year old parts.
Fuel:

Spark:

You are on your own for supplying the compression

PM your address and that sweet 99 will be back on the road.

[saabfan9]

can't wait to get her back on the road

[99Super]

[saabfan9]

so I got a new (used) pressure sensor and I'm getting the same readings... 2 outboard 7/15 read good at 90 ohms but the 2 inboard 8/10 read open ... does anyone else have one that they could test just to see if there is something wrong? I've looked at the downloads and it says I should be about 350 ohms

[DrewP]

I'll see if I can find mine and get back to you.

I think I took mine apart, you have to grind the end of the pins holding it together down, but I think the innards were pretty simple.