Where is inj. ecm or driver

20

Asked by Oct 22, 2013 at 10:33 PM about the 1979 Cadillac Eldorado

Question type: Maintenance & Repair

When the eldo I bought thats been parked for 15yrs ,starts missing,bucking,backfiring a half mi. from shop. Before I even tryed to start it I replaced the fuel tank, both fuel pumps, fuel filter. Then we started and ran in shop for probably an hr. before taking on road when started acting up. After babying back to shop I had good fuel psi and volumn,all inj.ohm'd the same, left #2 unpluged to check for noid when it started and sounded good again after plugging #2 in , took it on road again just to get stranded again. Have any ideas?  primative injection   6.0  368    Thanks

4 Answers

74,135

I'm assuming you don't have a diesel engine and the fifth character of the VIN is the letter "B"? If that is correct you have the V8 350 (5.7 Liter). The ECU (Electronic Control Unit) as they called it back in those days is usually found behind the glove box under the passenger's side dash. It will have a vacuum hose connected to it for the MAP (Manifold Absolute Pressure) sensor. That vacuum hose needs to be connected to the intake manifold. Check the EGR (Exhaust Gas Recirculation) valve for sticking. Also check the throttle position sensor for proper operation with an ohm meter. HTH. -Jim

4 of 4 people found this helpful.
20

Your rite it is a 5.7 and I did find the ecu. I disconnected the map hose from it to check for vac. or blockage and it started rite up reved, idled, ran rich but ran. Put hose back on while running, then it leaned out to the point of missing, bucking, stall. I'm thinking ECU Thanks Jim

2 of 2 people found this helpful.
74,135

You're welcome. Glad to help. Thanks for letting us know. -Jim

10

Coolant temperature sensor and intake manifold temperature sensor are likely the source of trouble. Both should show 1000 ohms give or take when cold.

1 of 1 people found this helpful.

Your Answer

Eldorado

Looking for a Used Eldorado in your area?

CarGurus has 336 nationwide Eldorado listings starting at $2,200.

ZIP:

Cadillac Eldorado Experts

  • #1
    spiderblu
    Reputation
    820
  • #2
    Js08016
    Reputation
    340
  • #3
    COMETGUY61
    Reputation
    300
View All

Related Models For Sale

Used Cadillac DeVille
3 Great Deals out of 1,437 listings starting at $1,988
Used Cadillac Seville
295 listings
Used Ford Mustang
457 Great Deals out of 42,833 listings starting at $1,488
Used Chevrolet Camaro
502 Great Deals out of 31,147 listings starting at $2,495
Used Chevrolet Corvette
180 Great Deals out of 16,275 listings starting at $3,000
Used Chevrolet Impala
534 Great Deals out of 33,172 listings starting at $1,495
Used Dodge Challenger
243 Great Deals out of 25,514 listings starting at $7,950
Used Lincoln Continental
15 Great Deals out of 3,115 listings starting at $32,999
Used Chevrolet Monte Carlo
7 Great Deals out of 1,248 listings starting at $1,125

Used Cars For Sale

1998 Cadillac Eldorado For Sale
24 listings starting at $2,200

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.