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1991 deville stumbles under acceleration - Cadillac Cars & Trucks

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6 Suggested Answers

6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

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motor1258
  • 6674 Answers

SOURCE: Stumbles, picks up stumbles and sometimes dies out

700 is transmission control system malfunction. For now I'd concentrate on 108 which is M.A.P. sensor . Likely needs to be replaced but try cleaning connection at it first. Possibility that the transmission code, is an old one, or it's been tripped somehow by other problem, so unless it's experiencing shifting problems, I wouldn't get too worried about it right now. Once you've cleaned, or replaced MAP sensor, disconnect battery for a minute or so, re-attach, & try it and see how it works. Keep me posted.

Posted on Mar 29, 2009

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localwonder
  • 6784 Answers

SOURCE: engine stumbles when accelerating

HI, you will need to replace the following.

1. replace the spark plugs and wires asap.
2. replace the fuel filter and pump as well.
3. replace the air filter.
4. Add a fuel system cleaner.(Techtron fuel injector cleaner is the best)


Replacing the above component's and adding a fuel system cleaner, will improve the performance of your vehicle dramatically.

Posted on Jun 01, 2009

  • 1 Answer

SOURCE: 2003 Lincoln Navigator stumbles/bucking under mild acceleration

I have a 2003 Nav with the exact same problem. I've found it diminishes when taken out of overdrive. Also it's intermittent but more towards bucking. Sorry to post this under solutions.

Posted on Nov 06, 2009

  • 3 Answers

SOURCE: 1991 cadillac deville fwd 4.9 engine shudders hard

I have a 1991 Cadillac Fleetwood 4.9 120000 miles, I have the same problem. replaced plugs,wires,cleaned throttle body, and O2 sensor and have same problem. Taking it to a GM shop on 02/24/10.

Posted on Feb 23, 2010

  • 594 Answers

SOURCE: truck has vortec 5.7L, idles fine, sputters and

check wire ,plugs, coil
scan tool to retrive misfire on witch cylinder

Posted on Mar 30, 2011

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I HAVE A 91 SEDAN DEVILLE.4.9 PORT FUEL INJECTION V8. I HAVE PLENTY OF ACCELERATION FROM STOP TO 20-30MPH. BUT WHEN I AM AT ANY CRUISE SPEED AND STEP ON THE ACCELERATOR IT HESITATES AND DOES NOT...


Sounds like a malfunctioning egr system. Too much egr gasses at once will lean out the air fuel mixture and cause hesitation in an engine. Just my 2 cents.

Jan 20, 2011 | 1991 Cadillac DeVille

2 Answers

1991 cadillac deville fwd 4.9 engine shudders hard under slight acceleration. replaced plugs,wires,cap,rotor button,ignition module,egr valve, cleaned throttle body, still have same problem


I have a 1991 Cadillac Fleetwood 4.9 120000 miles, I have the same problem. replaced plugs,wires,cleaned throttle body, and O2 sensor and have same problem. Taking it to a GM shop on 02/24/10.

Feb 13, 2010 | 1991 Cadillac DeVille

1 Answer

91 deville 4.9 fwd shudders under light acceleration


check the egr valve it mat be stuck closed ..... code PO404

Feb 13, 2010 | 1991 Cadillac DeVille

1 Answer

New battery, completely drains while car not used for a day. Initial problem car lost power while driving, rpm went up when accelerating but power didn't eventually stalled. Started again, ran real rough,...


The charging system is doing its job It seems to have an electrical short which is draining the batt. If u have the know how to ck & repair electrical shorts then go after it, if not, take it in.

Apr 06, 2017 | 1991 Cadillac DeVille

2 Answers

Stumbles on acceleration


Well, I would replace the air filter, make sure the air hose from the air filter to the intake is not kinked or blocked and check for vacuum leaks. If these are all fine, I would check the fuel pressure as it is possible the pump is weak and not supplying enough fuel.

May 14, 2009 | 1996 Volkswagen Jetta

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