Codes 4.9
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HT4100 4.1, 4.5, 4.9 Discussion, Codes 4.9 in Cadillac Engine Technical Discussion; Pulled these codes on my sons '92 Eldorado 4.9, E053, R033 and ECM? It's been dying out lately and won't ...
  1. #1
    eldoradogary is offline Cadillac Owners Fanatic
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    Codes 4.9

    Pulled these codes on my sons '92 Eldorado 4.9, E053, R033 and ECM?
    It's been dying out lately and won't start back up until it is cooled off for awhile. Can anyone help me with what these codes mean? I think the first one has something to do with the distributor.
    Thanks for any help.

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    dennis93coupe's Avatar
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    Re: Codes 4.9

    Got to this link on how to pull codes. There is a section on OBD I. Post back with your codes AND their definitions. Here's the link...

    http://www.cadillacforums.com/forums...odes-dtcs.html

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    E053 Distributor Signal Interupt
    R033 Derm Incompatibility
    ECM? Well I can't find that one anywhere.
    Any help appreciated.

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    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: Codes 4.9

    There has been a lot of 4.9 distributors dying lately. They must have been engineered to expire in exactly 20 years lol. It sounds like it could be just the ignition module. I don't recall how much they cost lately but the last one I bought seemed too expensive to me. If it turns out to be something else you may wish that you just bought the whole distributor for $150 or so in the first place. Since it seems to be heat related I would probably gamble on just a new module. good luck.

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    Re: Codes 4.9

    "ECM?" is not a code. It's asking if you want to move on to the next mode.

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    Thanks for the info guys, I've got a new Accell cap and rotor and a new Delco ignition module on the way, I'll start from there and see what happens.

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    Re: Codes 4.9

    If the ICM doesn't fix it, look to the pickup coil. That was the culprit on my distributor problem.

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    Re: Codes 4.9

    Quote Originally Posted by eldoradogary View Post
    Thanks for the info guys, I've got a new Accell cap and rotor and a new Delco ignition module on the way, I'll start from there and see what happens.
    Really, where did you find the Delco ICM?

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    Thanks for the pickup coil tip, found the ignition module at ebay, Delco Remy brand new in box $15 shipped.

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    OK, replaced the cap, rotor and ignition module. No more E053 code but still having problems with it wanting to die out or stall when driving. May be a fuel or injector problem, don't know. I guess I'll start by changing the fuel filter. Any ideas?

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    Changed fuel filter, wasn't the problem.

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    Re: Codes 4.9

    I read back through the posts again. You replaced the ICM, right? Did you use plenty of heat sink grease? I know everybody has got to be sick and tired of me asking, but what kind of shape is your harness in inside the distributor?

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    eldoradogary is offline Cadillac Owners Fanatic
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    Re: Codes 4.9

    Yes I used plenty of heat sink grease. Harness still seems ok. Today acted up again and wouldn't start for an hour. Checked codes and now getting current E048. I had cleaned the throttle body and there was a lot of carbon in one of those tubes. So I'm going to pull the EGR valve and clean it up. Should I pull the throttle body to access the EGR easier? BTW the E048 is an EGR code.

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    dennis93coupe's Avatar
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    Re: Codes 4.9

    You shouldn't be having the starting problem with that code, sounds like something else.

    Yes it is much easier if you remove the throttle body first. Makes getting to the EGR bolts real easy. I just leave the ISC and TPS on the throttle body when I clean it. NO adjustment needed. Check out your EGR real good, make sure it is clean and no tear in the diaphram. For that matter when you do get it to run at an idle, lift up under the diphram, it should loose a lot of RPM and might even die. Check your harness to the EGR solenoid.

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    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: Codes 4.9

    It sounds to me like the ISC isn't working at all.

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