Bad hesitation
Thread Starter
Drifting
Joined: May 2001
Posts: 1,295
Likes: 2
From: Surprise Arizona
I still get this hesitation when the throttle is opened. The engine will stumble a bit before reving up. Does it warm and cold. Replaced the cap, rotor, and coil, Used a Hypertech coil kit. New Taylor wires. Plugs are in great condition. Engine idles good. Base timing at 6 degrees. What could cause this stumble? Please help. I dont want to take it in somewhere. Any ideas please.
Thread Starter
Drifting
Joined: May 2001
Posts: 1,295
Likes: 2
From: Surprise Arizona
My TPS is set to .54 closed 4.1 WOT. Just did that. Also reset curb idle, closed the IAC, then unplug it and set base idle. That made a world of difference in the idle. Plug gap is .035". I will try .045 tonight. Should the plugs have anti sieze on the threads?
Drifting
Joined: Aug 2000
Posts: 1,251
Likes: 0
A guy was just on here with a similar problem his would hesitate & sometimes backfire.Anyway he replaced his fuel injectors & all was well.
You can test for leakage by squirting water at the injectors & listen for bogg or you can squirt a fuel at them & listen for idle speed increase.I think they use diesel fuel for saftey.
You can check them for resistance also,but I dont know how many Ohms there supposed to read.
You can test for leakage by squirting water at the injectors & listen for bogg or you can squirt a fuel at them & listen for idle speed increase.I think they use diesel fuel for saftey.
You can check them for resistance also,but I dont know how many Ohms there supposed to read.
Thread Starter
Drifting
Joined: May 2001
Posts: 1,295
Likes: 2
From: Surprise Arizona
The injectors all read the same ohmic value. I dont remember what is was. Tried using propane around the intake amd injectors looking for leaks. That didnt work worth a sh**. Idle is not water glass smooth. I have heard of a 3M product that is supposed to be about the best injector cleaner. It might be worth a try.
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Advanced
Joined: Mar 2001
Posts: 53
Likes: 0
From: Michigan City in
you might also want to check your fuel filter. mine was doing the same thing and i thought it might be either the fuel filter or the cats I decided to try the cheaper one first. fuel filter worked.