1096369

Hey Guys!

Newbie here..... And I realize a lot of newbies come here ask a question or two and fade into the background..... I am trying to do my homework and understand this car..... It is a 1984, 944, with 96k on the clock.... The car has a good heart, and has been very well maintained throughout its life, but is a "parts car", and my buddy (who owns and understands 944's) obtained the car to strip out.... But he knew I was looking for a project road car.... And suggested this might be just what I am looking for....

I am not The most mechanical guy but am in my late 40's, single, and have a little experience working on firearms and motorcycles..... Over the last 4 weeks I have been trying to bring this car back to life..... I get that the 944 Is not a Toyota Camry.... I think of it as an artistic girlfriend..... It needs a lot of attention, understanding, and an occasional firm hand, To perform at her best.


I have posted this on other sights, (full disclosure!), and my buddy and I have done all the usual stuff to get her back on the road:

Fuel rail pressure test
Noid test
Checked and cleaned all grounds.
Re-soldered the DME
AFM rehab.
Drained fuel tank
Pulled and checked vacuum lines
TPS test

***** REPLACED THE FOLLOWING PARTS*****

Timing and ballance belts 7/15
Speed and crank sensor 7/15 (*broke one... Removing..... Don't ask, that's three days of my life I won't get back!!!)
Replaced ref. sensor connectors 7/15
Rotor and distributor cap 7/15
New DME Relay 7/15
New Torpedo fuses (replaced all) 7/15
New spark plugs 7/15
Fuel filter 7/15
Fuel pump 7/15
New Battery 7/15
Fuel Pressure Regulator 8/15
Fuel Pressure Dampner 8/25
Coil (Used) 8/15
DME (Used) 8/25
AFM (Used) 9/22
TPS (Used) 9/22

All vaccuum hoses great and small 11/2 (*even that $70 bastard, under the manifold!)
Coolent temp sensor 11/2
Thermo Vacuum Valve 11/2
IACV (used) 11/2
Spark plug wires 11/2
Rebuilt Injectors (Mr. Injector) 11/2
Rebuilt Throttle Body 11/2

Water Pump (when I can get her running!)

This car will start and run, but stalls when you give it gas, and it won't restart..... Until it sits for "awhile". I Don't mean to whine like a little girl.... We have Been doing our due diligence and I just can't seem to track down this gremlin...

Any bright ideas? And sorry for crying with with same old problems... We even put my buddies AFM in today, as a "Hail Mary" his car is a 944/2 And it (of course) ran like hammered crap... (Super rich!) but it ran...(sorta) and even tolerated a bit of throttle.... But it ran so rough... It was Hard to tell if We were on to something....

When trying to restart, after a stall caused by stepping on accelerator:



It seems to fire, but cuts out, and ignition needs to be turned off to crank again....

In case you think I am hallucinating about it running.... Here is an video with it running at idle:

http://i497.photobucket.com/albums/r...ads/th_trim.16...

And because pictures help make my tribulations more personal,
And you may be more inclined to help,a poor, dumb, slob....

image_5.jpg


(Sigh!)

HEEEEELLLPPPP!!!
Thanks!
Fred

odonnell

It sounds like a bad AFM. Try getting your hands on a known good "early" AFM from a 944/1. Worst case, you have a spare part. If it's not that, it could be a bad TPS. I have a couple sitting in the garage. If you end up needing one let me know, just pay shipping, although I haven't tested them.

1096369

Hey S.H!
Thanks for the reply! We are currently leaning toward the AFM, and even tried the one out of my buddies 944/2.... We knew it would run Super pig rich, and it did.... We need to try his AFM with his DME As a next step to see if we have anything..... But iris car is his daily driver, so don't wanna wreck two to fix one!

We did do the AFM modification, and bench test, which checked out..... But it would be worth a look!

I found these on EBay..... Remanufactured..... What do you think, worth a shot at $215ish?

http://www.ebay.com/itm/Porsche-Bosc...52dc94&vxp=mtr


I can't see spending $100 for a used one that may have 30k or 300K on it.... When a "remanufactured" is doable for $200 after core charge.... We did check the TPS and it checked out.... (I think?)

1096369

Here is what she looks like.... Been calling her the Anti-Christ....
But not to her face!

odonnell

The late afm will not work correctly with an early DME. Hence why you should get one from a 944/1

1096369

Got it.... Will do..... Was trying not to throw stupid money at a problem....I tend to be a little impulsive, and Sadly I am not a wealthy Philamprothist..... But should be!

I guess a new AFM is my next step!

Thanks!
Fred

DarylJ

And since I didn't know early cars I just tried it and pretty much immediately knew it was wrong (idled pig rich), then looked it up and knew I did a stupid.

In the cards is swapping DME+AFM from my car to test this, although I would rather not (only car as the wife has my spare while hers is in the garage).

At this point I'm stumped because the obvious things have been eliminated. I've re-tracked and tested it according to the FR Wilk page that got my car going.

If anyone has any ideas past this I'd love to hear it. I don't want to have him go out and spend a few hundred bucks on an AFM that might not solve the problem.

He may have missed some of the things I've tested, but be sure one of them is the TPS all the way back to the DME and I've also reflowed the pin headers on the DME connector.

It's entirely possible I missed something in one of the tests and I'm ready to go back and do them again. If any of you have some glaring suspects of what's been listed please do tell. I'm not claiming my procedure is 100%.

This one is stumping me.

1096369

Daryl, has been very patient, with my endless question, ham handed wrenching, 50 percent comprehension of what the hell he is talking about (at best!), rookie mistakes, and inability to speak of much else at the watering hole!

What the heck.... Life is all about enthusiasms!

william_b_noble

if you suspect AFM, connect ohmmeter to it and move the flap by hand and watch the values - if it's worn out it will be evident. just open it up, reposition the wiper away from the worn track onto fresh carbon and close it up again

1096369

Hey Mr. Noble,

Thanks for the reply..... Yeah we did bench test the AFM with an ohmmeter, and did do the upgrade.... It checked out..... That is the frustrating thing with this problem.... We have done our due diligence..... And the Gremlin is still having his way with us!

So I am hoping someone will see this and say.... "AH-HA! I had the same problem...."


In my newbitude... I think there may be a clue when after a stall, and a attempt to restart.... The motor seems to briefly fire....and immediately shuts off. When I disconnect the AFM harness it cranks, but does not seem to fire at all....

Not sure that this proves anything.... But maybe?

Here is a video of what I mean....

http://vid497.photobucket.com/albums...AA0BD707D5.mp4

Thanks for the help!!!
Fred

odonnell

Have you replaced the fuel pressure regulator and the coolant temperature sensor? If you need a regulator, I have a 99.99% new one (used for 15 minutes) you can have for $50 shipped. Coolant temp sensors are ~$7 brand new but if you want one just to test, I have a good used one I can throw into the box.

I say that because dying right after a hot start is EFI related, which jives with your earlier comment about how you have to wait a while to restart it.

1096369

Hey SausageHacker,

P.M. Sent!

Thanks!!!
F.

konakat

Have you looked into the throttle position switch? You can try just disconnecting it, it may idle a little funny but should run fine without it. If it is bad the DME can end up using the idle fuel map all the time instead of the normal running map.

PeteL

Two thoughts - engine temp sensor...and/or bad wiring.
Had a similar problem thought it was the temp sensor, but turned out to be the wires in the boot for the temp sensor connector were shorting eachother out.

1096369

Thanks Guys!

Will try all of the above.... I'm not going to discount anything at this point! I'm pretty sure if this gremlin was a snake.... It would have bit me!