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85 eldorado leaking gas


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It sounds like a cracked canister to me, probably road damage. I don't know the configuration of the EVAP canister in the 2003 DTS so someone that has that platform needs to chip in here.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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It sounds like a cracked canister to me, probably road damage. I don't know the configuration of the EVAP canister in the 2003 DTS so someone that has that platform needs to chip in here.

He is talking about 85 Eldo.

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  • 3 weeks later...

Variations in the idle can happen if the EVAP system is letting gas and/or air into the plenum.

Have we looked at the OBD codes yet? Some do exist for the 1985 models.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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hmm interesting, havent head of this in awhile. Almost sounds like fuel vent is plugged and is causing fuel to back up into canister, and also you might consider looking at the fuel pressure regulator.

This is probably most definately the cause of the elevated idle

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Does anyone have a 1985 owner's manual or FSM that tells how to get at the OBD codes?

On my much older GM cars (1959, 1969, 1977, etc.) you shorted two pins of the pre-OBD connector and counted flashes of the CHECK ENGINE light. Instructions were in the Chilton's manuals, with most of the codes. After 1981 they had something that they called OBD. Who can help here?

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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I will look tonight, I actually have a jumper tool for them and a code book for the definitions

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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Hopefully those codes will tell us what is not working for the EVAP, and possibly the fuel injection.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Not surprised at that. Where and how they are displayed, what format they are, etc. is a mystery to me. If they have a character display, they are probably a major subset of our familiar OBD I codes. But, I don't know.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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I think the '85 was still OFF & WARMER to get the DTC's.

Yep. It was OFF and WARMER on my 1983 Coupe. I *think* OFF and HI cleared the codes (don't bet your ranch on this one, though). I don't imagine the '85 was any different.

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  • 2 weeks later...

The only code i got was 38

The code 38 is the MAT sensor, your cannister purge solenoid could be the issue.Restrictions in or leaking vacuum hoses.Check the 20A guage trans fuse, see if it is ok.Could also be short to ground in solenoid circuit.

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Your code 38 is the MAP sensor,could the problem be with the cannister purge solenoid?? Check all vacuum hoses for obstructions or leaks, check the GA Trans fuse(20 AMP) see if its ok. Could also be a short to ground in the solenoid circuit.

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Your code 38 is the MAP sensor. Check the cannister purge solenoid for functionality. Also check all Vacuum hoses for leaks or obstructions. Also could be a short to ground in the solenoid circuit. Also chk the GA trans fuse ( 20 Amp.)

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The code 38 is the MAT sensor, the purge solenoid could be the issue here. Also check all vacuum lines for leaks or blockage.Also check for short to ground on all wires in the solenoid circuit. Check that GA trans fuse is good.

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