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91 Eldo Still Dying on the Road!


bschelle

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Going down the road my 91 Eldo still dies. Just like I turned off the ignition! It hasn't done it all winter. I am begining to think it's temperature related. I have a fuel pressure gauge taped to the windshield and the pressure is steady before it dies and does'nt drop when it dies or when I try to start it.I drive about 6-7 miles before it does it.No codes show up. I let it sit for a couple of minutes and it usually starts. Today it did it and it took a while to start. It would catch and die a few times. When it did start it ran like it was flooded only hitting on a few cylinders then clearing up. I didn't see any black smoke from the exhaust. Again no codes. I have replaced the injectors, FPR, ignition control module, coil, wires and a complete tune up. What could be causing it to do this? What part is affected by temperature changes? I poked arround the wires from the distributor but it didn't do anything.

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I will do some checking....First thought waas ICM but you mentioned you changed it....

I know you did use AC Delco, and the Dilectric grease

a question is there a remote starter?

no security lights (VATS) comming on?

Any thing about the dash lights during event.....such as all warning lights come on: as during start?

an ign switch would act this way BUT the failure to restart for a while is not typical for that failure, Anither thought would be ECM shuting down I will see if the driver circuits are seperate and protected.

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I will do some checking....First thought waas ICM but you mentioned you changed it....

I know you did use AC Delco, and the Dilectric grease

a question is there a remote starter?

no security lights (VATS) comming on?

Any thing about the dash lights during event.....such as all warning lights come on: as during start?

an ign switch would act this way BUT the failure to restart for a while is not typical for that failure, Anither thought would be ECM shuting down I will see if the driver circuits are seperate and protected.

It was a NAPA Echlin cap, rotor, coil and module and I used the grease. No remote starter and when it dies nothing changes on the dash. All of the dash functions as if it is still running.

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I had a similar problem with my 94 deville 4.9. It ended up being the cam position sensor. It was a real pain to diagnose and a pain to replace and gap without removing the distributor.

It did throw a code once in a while for this problem. I was on a trip so it was dificult interpreting the code.

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sounds more electrical than fuel. Check Coil connections and make sure they are tight. I would be checking to make sure all of your electrical connector plugs are tight. Sounds like something is loose.

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I replaced the distributor last night. I let it warm up this morning and then took it for a 25 mile test ride and it didn't miss a beat. Time will tell if that is the final fix. I am having a problem with timing it. The manual says to jump pin A & B on the ALDL and that it is located on the drivers side by the parking brake pedal. I have a connector there but the first 3 slots on the top row of the connector are empty. Logan said the ALDL is behind a panel near the center of the dash but I don't see it. I timed it by aligning the ditributor 45 degrees off of the center line of the engine. It seems to run great but I don't want to have problems by not timing it with a light.

P.S. Kev2, did you get a chance to check your ECM info?

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See this for photo of ALDL, the ALDL is under the dash by your knees when you drive, there is a cover on it, if you get on your knees I think its in line with the steering wheel under the dash, take the cover off.

http://caddyinfo.ipbhost.com/index.php?sho...c=5875&st=0

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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See this for photo of ALDL, the ALDL is under the dash by your knees when you drive, there is a cover on it, if you get on your knees I think its in line with the steering wheel under the dash, take the cover off.

http://caddyinfo.ipbhost.com/index.php?sho...c=5875&st=0

Thanks for the link. This picture shows A & B are on the top right. I could have sworn my manual showed them on the top left! I will check it when I get home tonight. If the link picture is correct then the connector I am looking at is the one because there are terminals in the top right side> Thanks a million for the heads up!

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Thank Scotty, he's the man.... :P

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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