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94 blazer 1500 starts idles or rev to 5000 when in park or neutral. in drive idles ok but stumbles and dies when you accelerate under load.it takes awhile to reach 75 mphd it will kick down to climb a hill but come to a stop it will die unless i place it in neutral before i stop with brake applied or not. replaced: cap, rotor, temp sensor (in the head not the manifold),map sensor,fixed all grounded wires on the block and body and battery.

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Marvin

Cars & Trucks Master 85,242 Answers
Posted on Jan 08, 2017

Marvin

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Joined: Jun 20, 2008

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You either have a defective idle speed control valve or you have a huge vacuum leak on the engine like an intake manifold or warped throttle valve or throttle bore opening around the throttle valve, I have seen both...

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0helpful

1answer

High revs in park and neutral

What is the car? This sounds like it could be a throttle position sensor, (TPS). This monitors how hard you are pressing the gas pedal and if it is faulty it won't be reading the pedal movement correctly. Other symptoms are uneven idle and the acceleration isn't smooth or even.

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Jun 06, 2022 • Cars & Trucks

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2006 Ford ranger FX4 off road 4.0 engine has been stumbling and dying when I come to a stop. It is intermittent . when I am.coming down into 2nd and 1st gear the truck will sometimes start to stumble...

fuel filter,coils module.

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Feb 17, 2015 • Ford Cars & Trucks

1helpful

1answer

My 94 full size blazer starts and idles fine in park and in neutral. When I put the truck in gear and hit the gas, it'll start, then act like it wants to die. The Catalytic converter is off, I'

yes try getting the fuel pump pressure tested by a mechanic. the other thing it can be is the injectors are plugged try running some lucas fuel system cleaner.

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Jan 19, 2013 • Chevrolet 1500 Cars & Trucks

0helpful

2answers

I have a 2007 Chevy Trailblazer and I was driving down the road and the vehicle stopped accelerating. I pulled over and now you can shift from Park to Drive or Neutral but the vehicle will not start to...

I'd check transmission fluid first.

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Dec 26, 2012 • 2007 Chevrolet Blazer

1helpful

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My '94 Ford Taurus stalls whenever its idling in neutral or drive, in park its completely fine. When I give it gas in drive or neutral its completely fine and runs perfect but if i come to a light, or slow...

Disconnect your battery black wire off for 1/2 hour reconnect turn on all assesorys lights radio blower start car leave run for 5 min shut off for 5 min idle is controled by the computer the load
brings the idle up. Should be ok if not you may have to ajust the idle screw a little and then do this all over

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Feb 01, 2011 • Ford Taurus Cars & Trucks

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1answer

84 crx starts fine and idles fine in park and neutral, but dies immediatly when shifted to drive or reverse. Will run very roughly if pumping accelerator. What's going on?

You might want to check the engine for a vacume leak.Once the rpm's drop it may have a big enough vacume leak to not keep it running under a load.

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Feb 18, 2010 • 1984 Honda Civic

0helpful

1answer

I have a 94 blazer sport. The dash has a humming

Your electrical problem sound like there is a bad body ground or your ecm is going bad, as far as the other issue the 4.3's in the chevy blazer are notorious for the EGR valve going bad my stepson had a 94 blazer that had the same engine problem and it was the EGR valve and they are not cheap i think his was over $160.

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Dec 02, 2009 • 1994 Chevrolet S-10 Blazer

1helpful

1answer

I have a Chevrolet silverado 2000 V6, 4.3L The engine is start right away if i turn the key to start. At park (P) position or drive (D) position the engine try to stop if I press the paddle to accelerate,...

Does the engine accerlerate in neutral? Or does it die at higher speed in neutral??? If so you may have a plugged up exhaust system. Try disconnecting or loosneing up the flange before the catalic converter and then see if it runs normal.

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Oct 26, 2009 • 2000 Chevrolet Silverado 1500

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1answer

Car drops out at 2700 rpm and sputters

There is a rev limiter in these cars that disallows over revving in park or neutral. Does it climb past 2700 under hard acceleration?

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Jun 01, 2009 • 1990 Ford Thunderbird

0helpful

4answers

Ok... chev blazer 2003 is accelerating on its own..

might wanna check ur throtle position sensor

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Jun 13, 2008 • 2003 Chevrolet Blazer

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Marvin

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Related Questions:

High revs in park and neutral

2006 Ford ranger FX4 off road 4.0 engine has been stumbling and dying when I come to a stop. It is intermittent . when I am.coming down into 2nd and 1st gear the truck will sometimes start to stumble...

My 94 full size blazer starts and idles fine in park and in neutral. When I put the truck in gear and hit the gas, it'll start, then act like it wants to die. The Catalytic converter is off, I'

I have a 2007 Chevy Trailblazer and I was driving down the road and the vehicle stopped accelerating. I pulled over and now you can shift from Park to Drive or Neutral but the vehicle will not start to...

My '94 Ford Taurus stalls whenever its idling in neutral or drive, in park its completely fine. When I give it gas in drive or neutral its completely fine and runs perfect but if i come to a light, or slow...

84 crx starts fine and idles fine in park and neutral, but dies immediatly when shifted to drive or reverse. Will run very roughly if pumping accelerator. What's going on?

I have a 94 blazer sport. The dash has a humming

I have a Chevrolet silverado 2000 V6, 4.3L The engine is start right away if i turn the key to start. At park (P) position or drive (D) position the engine try to stop if I press the paddle to accelerate,...

Car drops out at 2700 rpm and sputters

Ok... chev blazer 2003 is accelerating on its own..

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High revs in park and neutral

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1 Answer

Marvin

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Related Questions:

High revs in park and neutral

2006 Ford ranger FX4 off road 4.0 engine has been stumbling and dying when I come to a stop. It is intermittent . when I am.coming down into 2nd and 1st gear the truck will sometimes start to stumble...

My 94 full size blazer starts and idles fine in park and in neutral. When I put the truck in gear and hit the gas, it'll start, then act like it wants to die. The Catalytic converter is off, I'

I have a 2007 Chevy Trailblazer and I was driving down the road and the vehicle stopped accelerating. I pulled over and now you can shift from Park to Drive or Neutral but the vehicle will not start to...

My '94 Ford Taurus stalls whenever its idling in neutral or drive, in park its completely fine. When I give it gas in drive or neutral its completely fine and runs perfect but if i come to a light, or slow...

84 crx starts fine and idles fine in park and neutral, but dies immediatly when shifted to drive or reverse. Will run very roughly if pumping accelerator. What's going on?

I have a 94 blazer sport. The dash has a humming

I have a Chevrolet silverado 2000 V6, 4.3L The engine is start right away if i turn the key to start. At park (P) position or drive (D) position the engine try to stop if I press the paddle to accelerate,...

Car drops out at 2700 rpm and sputters

Ok... chev blazer 2003 is accelerating on its own..

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High revs in park and neutral

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