Question about 1989 Chevrolet Beretta

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2.8 motor starts and dies

I have a 1989 beretta 2.8 auto It will start then dies it has 45 lbs fuel pressure new ECM new TPS new idle air control new plugs and tried coil& engine control mod ,map sensor, crank angle sensor from a running beretta same year and motor still the same I don't know what else to try no codes where on the old ECM Please let me know if you can help. Thanks

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  • rsawyers Apr 16, 2009

    it dies after is starts you don't have time to put it in gear

  • rsawyers Apr 18, 2009

    changed injectors same as before

  • jfirebird71 May 11, 2010

    had a cutlass with same engine did that it was bad injectors

  • jfirebird71 May 11, 2010

    does it stall when u put it in gear

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  • Master
  • 574 Answers

If the choke is open very far it will start and run for a second then die because its getting to much gas or flooding itself.

Posted on Sep 15, 2009

  • roberta3fan Sep 15, 2009

    thats if you have a choke. But you said its fuel injected so it doesn't have one

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I think this TSB will solve your problem even know your car is older.



NO: 18-05-96 Rev. A
GROUP: Vehicle Performance
DATE: May 24, 1996

SUBJECT: **Intermittent Rough Idle**
NOTE: This bulletin supersedes technical service bulletin 18-05-96 dated February 16, 1996 which should be removed from your files. The subject description was printed incorrectly and is marked with **ASTERISKS**
MODELS: 1991 - 1995 Acclaim/Spirit/LeBaron Sedan 1991 - 1993 Dynasty/New Yorker/New Yorker Salon 1991 - 1993 Daytona 1991 - 1995 LeBaron Coupe/LeBaron Convertible 1991 - 1994 Sundance/Shadow/Shadow Convertible 1991 - 1995 Caravan/Voyager/Town & Country NOTE: This bulletin applies to vehicles equipped with 2.2 liter and 2.5 liter engine and high pressure throttle body fuel injection.
SYMPTOM/CONDITION:
An intermittent rough idle may occur during cold engine operation, within 3 minutes after engine start up, in rainy weather and temperatures of approximately 30° to 50°F.

PARTS REQUIRED:
Quantity Part Number Part Name 1 4288298 Idle Air Control Motor (IAC) REPAIR PROCEDURE:
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  2. Install new IAC motor (P/N 4288298) and rubber O-ring, torque to 2 Nm (17 in. lbs).
CAUTION: The rubber o-ring must be installed with the IAC motor for proper operation.

I would also recommend doing a fuel pressure test to see if it loses fuel pressure overnight.

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I need to check the fule pump relay to see if it is bad because the car fails to start or dies when idling or approachin stops.


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1 Answer

1997 ford crown victoria starting problems


Sounds like you're on the right track. A bad TPS and ISC motor sensor will cause the problems you're experiencing. Your ECM relies on the readings it gets from the TPS to be sure there is enough air getting to the engine. If the ECM gets a bad reading and thinks not enough air is getting to the engine, it will cut the fuel supply, hence causing your engine to die. Your ISC relies on the reading from the TPS as well. It detects from the ECM if the throttle plate is closed or not. If it thinks the throttle plate is fully closed, it will start allowing air to enter the engine and bypass the throttle plate. If your ECM starts seeing some unmeasured air coming from ISC and detects the throttle plate is open (which it may not be due to a bad TPS reading), the ECM will again cut the fuel supply to avoid the risk of detonation.

So, replace your TPS first and see if that cures your problem. Also, check the resistence readings of your ISC to be sure that is within spec. If your problem still occurs, check your Intake Air Temperature (IAT) sensor in your air filter housing. Be sure your spark plugs, plug wires, and distributor are all in good shape as well. Replace your fuel filter if you haven't done so in the past 2-3 years.
Good luck!

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