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

67,445

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.
67,445

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

Add photo

Related Questions

Eldorado

Looking for a Used Eldorado in your area?

CarGurus has 349 nationwide Eldorado listings starting at $2,450.

ZIP:

Search Cadillac Eldorado Questions

Cadillac Eldorado Experts

#1 spiderblu
spiderblu
Reputation 810
#2 Js08016
Js08016
Reputation 330
#3 COMETGUY61
COMETGUY61
Reputation 300
View All

Related Models For Sale

Used Cadillac DeVille
4 Great Deals out of 1,627 listings starting at $1,988
Used Cadillac Seville
330 listings starting at $1,100
Used Chevrolet Corvette
149 Great Deals out of 20,684 listings starting at $3,995
Used Chevrolet Impala
590 Great Deals out of 34,064 listings starting at $899
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999
Used Chevrolet Monte Carlo
20 Great Deals out of 1,419 listings starting at $1,995
Used Lincoln Continental
6 Great Deals out of 5,051 listings starting at $37,988
Used Buick Riviera
118 listings
Used Chevrolet Camaro
244 Great Deals out of 31,194 listings starting at $369

Used Cars For Sale

2002 Cadillac Eldorado For Sale
26 listings starting at $2,900
2001 Cadillac Eldorado For Sale
30 listings starting at $2,450

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.