Question about 1991 Cadillac Seville

1 Answer

Caddy seville dies when turning

Our 1991 cad seville dies when turning and during reacceleration

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Expert
  • 52 Answers

It is the modulator valve..replace it.

Posted on Oct 13, 2008

  • Mary Petrangelo
    Mary Petrangelo Oct 14, 2008

    Clean out the EGR and check the feul filters too. I should have mentioned this too.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Where is ECM in 2000 cadillac Seville sls

If it's like my 1989 Caddy Seville - it's under the distributer cap.

Aug 16, 2014 | 2000 Cadillac Seville SLS

1 Answer

To be more specific its a 91 eldorado. i have the wiring grid for the bcm but can't locate a relay. everything i read suggested control module/resistor but nothing changed with a new one.

please , do post all facts. none of this makes any sense
sorry !
what car, 91 eldo, ok. Caddy. a very old car. (problems aplenty)
what engine?????????? is it an engine issue???????
3.0, 4.5,4.6l or 4.9Liter ? DOHC engine>?

what country> (guess USA, but how would i know that?)
BCM a 91 has a BCM. ill look that up, GRid what is a grid.?
why not post the symptoms and get GREAT advice.?
I see no BCM, (body computer in 1991 only the PCM /ECU)

ok i now read all you post and see the word blower.
the HVAC blower?
some cads have, quote.
A vehicle that has front and rear climate controls may be configured differently than a vehicle that has front controls only.

does the blower fail on all speeds,?
ok, you said, blower runs with the ignition key removed.
this is NOT a blower problem, its a KEY issue.(circuiT)
AH, GRID, you mean a SCHEMTIC, or wiring diagram.
the FSM has this as does (should)

sadly my online source the climate control module is not covered.

Id check my ignition key (off) the pins on the switch proper
do not have power on the output pins.
this car has yellow wire that is hot at all times
but the others must be dead key off.
other key facts. no pun

under dash "intererior relay center"
pull the relays 1 by one ,see if the blower goes off, be a big clue.

15 relays there, and 2 spare spots
RAP relay?
RAP Accessories?
Retained Accessory Power
some cars have this , and delays the aCCessories from turning off
until, doors open or even a delay.
what controls this in 1991 ive not a clue.
quotes from web:
The 85 redesign introduced the "retained power accessory" feature where certain features like the radio and power windows remain available for a short period of time after the ignition is shut off.

on new cars this is a BCM function, pure software. too.
cept a relay.
its only my guess that this is RAP failure causing Climate control to fail. pure guess.
no drawings,
id buy the FSM. i never restore any old car without one.
saves me a bundle over time.

like here

and here

May 14, 2014 | Cars & Trucks

1 Answer

Anti theft system in a 1997 Cad.Seville "Starter disabled" Car has been sitting for a while in humid conditions.

you may have to start from scratch with starting your car. does your radio have to be recoded after the battery dies? if so do not attempt to do this!! remove the positive side of battery terminal for 10 mins. this will reset the cars computer. whan you put the positive cable back onto the battery the car should start, if not, try to boost the car. the car should start. hope this helps and thank you for choosing

Nov 11, 2010 | 1997 Cadillac Seville

1 Answer

1991 Cadillac Seville wont turn over starter tested and is fine. Its drained 3 batteries in the last 12 months. Tryed banging on it and nothing.

Have your alternator tested too; if it has a sick diode, it can drain the battery and also shunt current away from the starter as well as damage the battery by applying unrectified voltage on one leg of the output. I replaced SIX (6) Delco alternators in nine years on a car built in '95. It would have been more except the engine failed at 57,600 miles and I junked the lemon.
If the starter solenoid is not integrated on your Caddy, it too can fail which will cause too much lost voltage trying to get to the starter. 

Apr 14, 2009 | 1991 Cadillac Seville

1 Answer


The problem is almost certasinly that dried gas residue has plugged the injector spray tip, most likely they are ruined and will need to be replaced, the only way to determine this 100% is to have a dealer run a injector flow test, they may be able to power clean them, here is the price of the replacements.

ACDELCO Part # 217296 moreinfo.gif {#17112982}
INJECTOR KIT,SEQ M/PORT FUEL REQUIRES O-RING P/N 217-1379 217-296.jpg $95.79

Apr 14, 2009 | 1991 Cadillac DeVille

1 Answer

1991 cadillac seville will not start

first disconnect the battery and wait ten minutes this will dis able the battery. then get a manual there are several small parts that need to go in a certain way. and for the guy that his car starts then dies sounds like your exhaust system is plugged, simple test disconnect the exhaust just before the catalytic converter and start the engine see it still dies. and the problem isn't even close to the same

Mar 13, 2009 | 1991 Cadillac Seville

1 Answer


sounds like a burnt out catalytic converter. I had this problem with one of my sons caddy's we replaced the CAT and it was fine. But it could be the the fuel injector (s) are clogged. Do you use injector cleaner when you gas up once a month??

Aug 15, 2008 | 1991 Cadillac Seville

Not finding what you are looking for?
1991 Cadillac Seville Logo

Related Topics:

147 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides