Car keeps dying and idling rough.....why?

Asked by Mar 07, 2014 at 12:59 AM about the 1989 Chevrolet Caprice Classic Brougham Sedan RWD

Question type: Maintenance & Repair

1989 Chevy Caprice 5.0l TBI dies when
stopping and shifting into drive or reverse,
but idles fine in neutral or park. I've
replaced TPS, EGR, IAC, Coolant temp
sensor,  MAP sensor, fuel filter, pcv valve,
o2 sensor, cap, rotor, spark plugs and wires,
most vacuum hoses, radiator and water
pump. All original with under 26k miles.
Performed fresh oil change. Added Marvel
Mystery Oil and oil light began to flicker.
What's going on?

6 Answers

105,455

I would be more concerned about your oil pressure problem first, without oil you will loose the engine.

20

In some of the older cars, there is a modulator in the transmission. It runs on the vacuum created by the engine. If the modulator goes bad, and it sucks all the vacuum from the engine, it will run rough. Look in to that and see if it helps you out. As far as the oil light, that Marvel mystery oil may have done some real "housekeeping" inside your engine. Try running some good 10W 30 motor oil (not synthetic) without any additives. See how it goes.

40

pop your radiator cap and fill, let the car run with the cap off, if you see bubbles, the head gasket is bad, also pop a spark plug out of each side, if it's brown like chocolate its fine if its black you could have a bad injector, also to rebuild your throttle body with fuel pressure regulator is about $40

My car doing the same thing I have 32,000miles on car what is the problem?

10

We had exact same problem. Took forever to find it. Ended up being a crack in the rubber tube in the fuel pump. Small crack but every time we put a load on it, it would die. Like you we replaced everything else unnecessarily. At idle was fine but when pit a load on it it couldn't get enough gas because of cracked hose

1 of 1 people found this helpful.

I have a 1981 curve caprice with 83,something thousand miles every time I started up the engine be revving High like someone pushing the gas some times when I cut it off. It will backfired still can't find out the problem what it is then when I drive it hesitate and stall when I push the gas when I try to make it go up to 45 mph would could that be

Your Answer

Caprice

Looking for a Used Caprice in your area?

CarGurus has 149 nationwide Caprice listings starting at $9,995.

ZIP:

Chevrolet Caprice Experts

  • #1
    Js08016
    Reputation
    500
  • #2
    dandyoun
    Reputation
    270
  • #3
    tennisshoes
    Reputation
    230
View All

Related Models For Sale

Used Chevrolet Camaro
467 Great Deals out of 31,602 listings starting at $1,450
Used Chevrolet Monte Carlo
10 Great Deals out of 1,252 listings starting at $999
Used Ford Mustang
606 Great Deals out of 39,402 listings starting at $1,895
Used Ford Crown Victoria
955 listings starting at $1,496
Used Chevrolet Corvette
181 Great Deals out of 17,470 listings starting at $3,000
Used Buick Regal
160 Great Deals out of 7,514 listings starting at $3,995

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.