CIS Gurus,,,I've had it!

[vizail]

Westy

Please let us know what the shop find's..! I'll bet you is a simple thing.
member that we are learning here as well as you..!

Vic

[David]

You might try adjusting the ignition timing. This might allow you to get it running so you can trouble shoot more.

[Paulporsche]

Did you ever go back and check your valve adjustment?

[Westy]

The motor was too hot. That's todays project.

[vizail]

Westy

Don't forget to up date us if you solve the problem..!

Vic

[Westy]

'nother update. Advanced the ignition to get it running, futzed around,,,,but no avail. The car started up pretty easy, ran for a while, and once it got warm it died. Jimmy kept adjusting, but it wouldn't stay running. OK, so we got out the old brake cleaner can and did find a small leak somewhere in the back. We're gonna recheck the fuel pressures cold and hot, and look into the fuel distributor. Checked the valves and they were just right. Don't know what the clattering is, but it only started after I put the motor back in. Sticky valve maybe??? I don't know.

Stay tuned,,,,probably next weekend.

Brian W

[David]

This still sounds like a bad WUR. It sounds like there's a pressure problem. System, cold, and warm pressure?

Have you checked your fuel flow rate? Return line to make sure it's not clogged? Rust in the tank? Clogged tank screen?

Is the piston in your fuel distributor clean? Be careful removing it. Don't do it over concrete where you could drop it and scratch it. I've polished them in a lathe with 2000 grit paper and WD40. It should move in the distributor with no resistance.

I feel your pain. I fought a CIS non-running problem for over a year on a 78 SC. The main culprit was the WUR but there were many other little problems from sitting for 5 years.

[Westy]

The WUR is brand new from Pelican. The fuel pressures are next to be checked (again). No rust in the tank,,,it is spotless. I'm thinking the fuel dist might have some issues, but we won't know until later on in the week or even the weekend. I will keep everyone posted. Hopefully this thread will help someone in the future.

I've always wanted ultimate thread status, but not this way.

[Mysterytrain]

Man, this thread makes my head hurt. Too much stuff is being tweeked or changed so you have no baseline to work from. Am I correct in thinking that the air box has been replaced along with the WUR? If that is the case you have a huge window for screw ups before you started to tweek the ignition and idle/mixture settings. A massive air leak will act in the same way..car starts cold ( real rich condition, WUR is rich, Cold Start valve is spraying) then once all that extra fuel is cut off ( cold start valve shuts off ) the system is real lean and dies. The rubber intake boots might be cracked and leaking did they install new ones? are they all in place correctly? The rubber duct that connects the throttle body to the air box might not be seated correctly or might be cracked ( check the nipple on the back). The air connections that feed the AAR and AAV might be leaking or not connected properly. The cold start valve has a seal that might be leaking. The air sensor plate might have been knocked out of wack. I would backtrack all the "professional" work. Then I would toss some gauges on the system and make sure all the pressures are correct, even a new WUR can be suspect and usually needs to be adjusted. The throttle body adjustment should be set so that the butterfly does not bind when it is closed so basically a c -hair from full closure. You need to attack this systematically.

[Paulporsche]

Do you have a Permatune CD? Many posters have had problems w/ them cutting out once they heat up.

Also, did you ever check your DME and relay?

[RoninLB]

any sucking or gurgling noise heard in the engine compartment after it starts till it shuts down ?

[Westy]

Yeah you guys are saying everything I've been reading about and checking. I have two CDI's, no diff when I swap them out. New WUR and airbox, but I think it's a vacuum thing. Ron is thinking where I'm thinking. It's all good until it warms up, the vacuum leak rears it's ugly head, and the car dies. Throttle body is adjusted correctly, unsure about the cold start valve. I didn't replace that o-ring,,,it could be suspect, not sure about the boot, but i THOUGHT it looked fine.

Jimmy is helping me trouble shoot. I'm sure we will figure it out, it's just gonna take some time.

[vizail]

Westy

I realy wish you can fix it..! I'm axious as you are to learn what the hck happened.

Vic

[rahtidone]

Westy my prayers are with you, had similar problems and have let the car sit for 4 months as I work on my other car projects in addition to the house. Keep the faith brother.

[Westy]

Ronin, nope, just sounds like flatulance as it expires. What the heck, it IS a gas problem!

Also, haven't checked DME, but I have tried two separate CDI boxes. I doubt it's the DME relay though, 'cause at one time I had it running smoothly for about 15 minutes. It got good and hot.

[David]

Does it back fire through the intake as you're trying to start it?

[GenX Porsche]

I am not expert in this matter and I dont even know if my experiences can help but I am going to throw it out there because it sounds like you are despirate, I know I have been there with my CIS. I had issues with a stuck fuel distributor on a 73.5. What happened was that it would start and just dump fuel into the engine causing it to run but eventually bog down and die. You have more than enough suggestions of where to look next but I just wanted to throw this out as another place to look. May the CIS gods look kindly on you because I have been in your exact place. I JUST WANT TO DRIVE THE FREAKING CAR!!!
David

[Westy]

David #1, nope, no backfires anymore. It actually tells me it wants to run, just not once it warms up.

David #2, I am not an expert either, and thank you for any suggestions. The fuel ditributor issue has been suggested several times, and it is at the top of my list. Unfortunately, I believe the motor will be coming out again for the R&R.

[MobileWrks]

" stop getting worried brian, have a beer and chill..." i got several things to try, and probly be there friday.... NO R&R....

[David]

The no backfires makes me think it's not pressure related.