Car won't start

Tiny
LEWIS25
  • MEMBER
  • 1994 CADILLAC SLS
  • V8
  • FWD
  • AUTOMATIC
  • 215,000 MILES
I have 1994 Cadillac Seville SLS. I put another engine in it and now it won't start. The engine crank in the other car. I checked to see if it was firing but it wasn't.
Do you
have the same problem?
Yes
No
Friday, April 8th, 2011 AT 1:15 PM

49 Replies

Tiny
JDL
  • EXPERT
Sometimes you need to use computer from donor vehicle. Will the engine crank? Do you have a security system?
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 1:45 PM
Tiny
LEWIS25
  • MEMBER
The engine won't crank. I changed every sensor on the engine and it is getting gas but no fire.
Was this
answer
helpful?
Yes
No
+2
Friday, April 8th, 2011 AT 2:06 PM
Tiny
JDL
  • EXPERT
Are you saying there is no spark at the plugs?

Your security system will kill the starter and injector pulse.
Was this
answer
helpful?
Yes
No
+2
Friday, April 8th, 2011 AT 2:32 PM
Tiny
LEWIS25
  • MEMBER
I used the alarm keypad to unlock the doors but it still won't start. Both engines were running before I swapped them.
Was this
answer
helpful?
Yes
No
+1
Friday, April 8th, 2011 AT 3:03 PM
Tiny
JDL
  • EXPERT
Was the engine out of the same year--make--model? The control system for the engine may not work, unless the computers are the same?

Check applicable trouble codes.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 3:32 PM
Tiny
LEWIS25
  • MEMBER
The engine came out of a 1996 Cadillac Sedan Deville.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 3:34 PM
Tiny
JDL
  • EXPERT
The computers don't show to be the same. I don't think it will work.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 3:56 PM
Tiny
LEWIS25
  • MEMBER
I swapped every sensor on the engine. Is there any way to make it work?
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 4:19 PM
Tiny
JDL
  • EXPERT
Can you communicate with computer, check trouble codes? Can you get the computer from donor vehicle, don't know if everything will match-up, connectors, systems?

To check for codes, ignition on, press off and warmer buttons at the climate control center, at the same time. It should go into segment check, when it does release buttons, the codes should start to show up on the driver information center. Post the codes, me or somebody will talk to you.

Also, you can check the starter circuit at the starter, the purple wire at the starter solenoid S terminal should be hot with key in the crank position. If it isn't, you need to backtrack the circuit. Any testing at the starter, you need to make sure the tranny is in park or neutral and a functional e-brake is set.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 5:19 PM
Tiny
LEWIS25
  • MEMBER
It says P052, P109, i052, S036, S044, S060, S061, S062, and S070 all said history. P015, P055, T061 current. No ACP, No SIR, and PCM.
Was this
answer
helpful?
Yes
No
-1
Friday, April 8th, 2011 AT 6:09 PM
Tiny
JDL
  • EXPERT
The p015 and p055, I know what they are, shouldn't have any effect on your starter circuit. I can't find the T061, don't know? I'll look some more.

I gave you the wiring info on your starter circuit, did you check it?
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 6:37 PM
Tiny
LEWIS25
  • MEMBER
It turns over. It just won't crank.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 6:41 PM
Tiny
JDL
  • EXPERT
Cranking is starter action, so you saying it cranks good but won't start?

Engine cranking, do you have spark at the plugs and injector pulse? The po15 has to do with coolant temp sensor. The p055 has to do with throttle position sensor. I know you said you replaced all engine sensors, but, if the problem is on the wiring circuit somewhere, replacing parts won't fix it.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 6:57 PM
Tiny
LEWIS25
  • MEMBER
It does turn over good, it just won't start up. I checked the fire at each of the coils and neither one is firing.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 7:03 PM
Tiny
JDL
  • EXPERT
Did you check for primary voltage at the ignition module. Check ground also. Take connector loose from ignition module, key on, no need to crank. Use a testlite between pink wire and black wire at the harness connector. If the lite comes on, voltage and ground should be ok.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 7:19 PM
Tiny
LEWIS25
  • MEMBER
I checked it with a voltmeter and it has 11.94 volts.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 7:33 PM
Tiny
JDL
  • EXPERT
Same reading across battery posts? Some of the national brand autostores may be able to check ignition module for you. You can call and ask?
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 7:38 PM
Tiny
LEWIS25
  • MEMBER
I called and none of them can check it.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 7:44 PM
Tiny
JDL
  • EXPERT
Do an ohms test on crank sensors, 800--1200 ohms, if they both test ok, replace the ignition module, because I don't know what else to tell you. I hate to see you throw parts at, but, I've gone about as far as I can.
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 8:08 PM
Tiny
LEWIS25
  • MEMBER
How do I test them?
Was this
answer
helpful?
Yes
No
Friday, April 8th, 2011 AT 9:32 PM

Please login or register to post a reply.

Recommended Guides