Full Size Hesitation

[winsett]

I've got a '94 Full Size Blazer with hesitation problems when I accellerate.
Replaced: Fuel Filter, Plugs, Distrib. cap, fuel pump, fuel sending unit, O2 Sensor, and the air filter with a K&N. Also, my plug wires look fine as does my fuel lines.

It seems only to choke/hesitate from a stopped position with heavy gas applied. My I am not too familiar with the TBI system, but am contemplating gettting the Throttle Body Spacer. I haven't checked the fuel pressure, but I'm assuming its OK considering all the new parts I have added.
Please give some helpful advice if you know any possible solutions to this problem.
Thanks and check out my gallery if you like!

[Mikado14]

Don;t take this the wrong way but you are guessing on the fuel pressure. Your symptoms sound like classic fuel problems. Check your pressure and change your fuel filter.

[winsett]

me again....forgot to mention that when it's cold, the problem seems non-existant and horsepower seems exceptional. Could this be a Coolant Temperature Sensor problem?

[winsett]

Originally Posted by winsett

I've got a '94 Full Size Blazer with hesitation problems when I accellerate.
Replaced: Fuel Filter, Plugs, Distrib. cap, fuel pump, fuel sending unit, O2 Sensor, and the air filter with a K&N. Also, my plug wires look fine as does my fuel lines.

It seems only to choke/hesitate from a stopped position with heavy gas applied. My I am not too familiar with the TBI system, but am contemplating gettting the Throttle Body Spacer. I haven't checked the fuel pressure, but I'm assuming its OK considering all the new parts I have added.
Please give some helpful advice if you know any possible solutions to this problem.
Thanks and check out my gallery if you like!

As mentioned here as well, it runs sweet when cold, but when warm and passing throught the 1500 rpm range, it stutters (sometimes with backfire when dropping gears to accellerate). I'm thinking the temperature sensor has something to do with it but I'm not familiar with the injection system. Would like to address the problem without having to have the timing done again.

[BlazerLT]

Have you checked the timing lately with a timing gun?

Remeber if you do to remove the timing advance wire from the computer and set the timing to zero and reconnect the wire.

[winsett]

Blazer LT...thanks for the helpful advice....

Turned out to be the timing due to a loose distributor and now after being reset, she running like a gem again! I've noticed you reply to a heap of us Driveway Dreamers and I commend you on your helpfulness!

[BlazerLT]

Excellent, glad to see you rolling at 100% again.

Thanks for the compliment, I try to help when I can in my spare time.