Question about 1989 Chevrolet Corvette

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1989 corvette starts good runs rough and will not accellerate. When you hit the throttle, it acts like it is not getting fuel. Replaced the fuel filter, did a check on the fuel pump with a gauge and it is right around 40 psi at idle. As soon as I advance the throttle the pressure goes up a little but it seems as though the engine just starts starving. No codes on the ECM (PAPERCLIP METHOD). Also changed the cap and rotor

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  • Chevrolet Master
  • 15,575 Answers

Posted on Jul 10, 2017

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6 Suggested Answers

6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Christopher Keene

  • 201 Answers

SOURCE: Bogging while heavy accelration.

vacuum advance working ? do manuel check with cap and rotor button off and see if it's moving. chris

Posted on May 08, 2009

Molson02536

Harvey N Tawatao

  • 3854 Answers

SOURCE: 95 Chevy C-1500 runs rough at idle and during accelleration

Check the vacuum line to the fuel pressure regulator and check to see if the fuel pressure regulator has gone bad. Give the throttle body a good cleaning and the injectors too. Do not use carb cleaner, it's to corrosive for the gaskets used in the throttle body. The other thing too that would cause this is a stuck or bad EGR valve, Try cleaning the EGR valve too since your cleaning the throttle body. Good luck and keep me posted.

Posted on Jun 11, 2009

drallim

  • 4088 Answers

SOURCE: 1987 chevy s10 2.5l tbi will not start. changed

That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.

Posted on Jul 17, 2009

pippall

Philip Long

  • 1486 Answers

SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

alicantecoli

Colin Stickland

  • 22484 Answers

SOURCE: Starts and dies on acceleration then will not run

try pouring some neat petrol into manifold and if it fires we can go from their .

Posted on Nov 15, 2009

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1 Answer

Engine runs rough and gets worse when accellerating


PROBLEM TROUBLE AREA
Rough idle, stalls or
hesitate on acceleration :
.Spark plug faulty
. High-tension cords faulty
Ignition problems:
• Ignition coil
• Igniter
• Distributor
. Incorrect ignition timing
Vacuum leaks:
. PCV valve and line.. .
. EGR line..
. Intake manifold.
• Throttle body
• ISC valve
• Brake booster line

• Throttle body
• Brake booster line
. Incorrect idle speed
. Reset timing
. Adjust valve clearance
. Check fuel system . Check air cleaner
. Incorrect valve clearance
. EFI system problems
. Low compression


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1 Answer

89 corvette hard to start after setting a day or two act like not getting fuel


Check your fuel pressure it should be 40-47 with the key and engine off and 30-44 with engine running.If its not within these specs then replace the fuel pump and filter.

Aug 08, 2011 | 1989 Chevrolet Corvette

1 Answer

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on the back of the throttle butterfly is a sensor that controls the amount of fuel and it has carbon paths inside it ands i think this is the one causing your problem ,

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i want to give you the right answer but the only thing i think of is the mass air flow sensor.

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1 Answer

After start up,{about 10-mins.] the engine bogs out, No throttle.


i have a 1990 vette doing the exact same thing. i have checked; fuel pressure, replaced fuel filter, checked spark, checked engine vacuum and i still cant seem to get the car to run once it's up to temp. any help on this would be great.

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1 Answer

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