S10 4.3l won't accelerate

[jmssaws]

Is it mass air?
Sounds exactly like one that the mass air meter is unplugged on

 

[paragonbuilder]

Is it mass air?
Sounds exactly like one that the mass air meter is unplugged on

Yes, replaced it twice now thinking I got a bad one

 

[paragonbuilder]

Check the distributor drive gear for wear. I had a 4.3 that did damn near the same thing.

Timing is off? The rotor does have a little okay...

 

[Motorhead]

I just remembered a problem I had with my 4.3 and it was doing the same thing,I put a new fuel filter on it and no more problems.

 

[paragonbuilder]

I just remembered a problem I had with my 4.3 and it was doing the same thing,I put a new fuel filter on it and no more problems.

Tried that too....

 

[jmssaws]

You check the wires going to the mass air?

 

[jmssaws]

What codes are in it?

 

[Mastermind]

Timing is off? The rotor does have a little okay...

My started as a slight hesitation.......and got worse fast.

 

[paragonbuilder]

You check the wires going to the mass air?

Not exactly, but when I unplug it, it stumbles.

 

[paragonbuilder]

What codes are in it?

I get a misfire occasionally, but mostly it's clear. I only get codes when I pull wires.

 

[paragonbuilder]

I can't drive it to put it thru its paces

 

[Motorhead]

Timing chain is another possibility.

 

[paragonbuilder]

Just seems weird how well it starts and ldles if I don't touch the throttle... But I've got some things to check now... Thanks guys!

 

[junkman]

I can fix the problem for good.

 

[Motorhead]

crush it melt it down and start over again

 

[paragonbuilder]

crush it melt it down and start over again

Believe me it's crossed my mind... But I don't like being beat ...
If I learn something than I can let it go...

 

[paragonbuilder]

I can fix the problem for good.

It would cost me a mint to get it to you... And I'd get what, $25?

 

[ABarrick]

Does it idle "perfect" or is it labored or rough in any way? If you unplug a sensor while it's running it will typically stall. If you cycle the key it should restart(ses lamp will be on) and run. It may not run perfectly but atleast run. If the unplugged part was giving an erroneous resding, it should run better than when it was plugged in. MAF are notoriously junk on those vehicles. TPS could be wacking out too. IAT reading and ECT readings could off and messing with fuel trims too.

If you very carefully ease the throttle open does it instantly stall or will it pick up some rpms?


Dumb question, did you just get gas? How cold is it in your neck of the woods and is it parked outside? Could be a partially frozen/ restricted fuel line. Could be letting enough through to idle but no more.

 

[Cutforfun]

Fuel pump is my bet, I have a 4.3 in my Toyota and had the same problems, it would idle fine and run good for about 10 seconds when you revved it up then it would fall on its face and almost die. It was actually the fuel filter in the tank at, the pump filter had rotted off and was sucking crap from the bottom of the tank and starving it for fuel. But it needed 45psi to run right.

 

[jake wells]

a failing fuel pump will do it also.