84 crossfire stumble on hard accel while turning

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Sep 5, 2008 | 11:45 PM

thewrenchhead

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84 crossfire stumble on hard accel while turning

Hoping someone can give me a little insight?I have an 84 crossfire runs great,has no problem hard accel when going straight,it will roast the tires with ease,but if you get on it hard from a stop while going left or right it will stumble bad almost sounds like it is stalling ,or as if the fuel filter is plugged.If you let off it and get going straight again it takes off fine.Is this some sort of traction control?If anyone has any info please help,very happy with it other than this issue.Thanks for any info!!

Sep 6, 2008 | 12:36 AM

Frizlefrak

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From: El Paso Texas

How much fuel is in the tank when this happens? Below 1/4 of a tank, this is a common issue and is simple fuel starvation. The fuel sloshes to one side of the tank, and the pump is simply sucking air, and the pressure falls off momentarily. The solution is to keep the tank full(er).

You could also change to a 85-91 fuel pump, which provides more flow. The regulator will keep the pressure at a max of 13 psi, right where it belongs.

Sep 6, 2008 | 09:24 AM

thewrenchhead

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I first noticed it when it was below 1/4 tank but filled it and it still will do it!Will be hooking up a press guage soon to see if it is a fuel problem,i really like the car it runs great and handles awesome,but don't like having it fall on it's face when trying to take off while turning!!Any other idea's please let me know,and thank you for your response!!

Sep 6, 2008 | 09:53 AM

CFI-EFI

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From: The Top of Utah

Quote:

Originally Posted by Frizlefrak

You could also change to a 85-91 fuel pump, which provides more flow. The regulator will keep the pressure at a max of 13 psi, right where it belongs.

DO hook up a fuel pressure gauge. Cornering should have no effect on the pump or it's ability to provide flow or pressure. If the fuel pressure drops during cornering when the tank is near full, you should inspect the fuel pick up. The pump may have broken loose from it's mounting. Since the present pump can maintain pressure, as evidenced by straight line performance, the only noticeable additional flow a 85-91 fuel pump will provide will be from your wallet, buying an unneeded pump.

RACE ON!!!

Sep 6, 2008 | 01:21 PM

Frizlefrak

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From: El Paso Texas

Quote:

Originally Posted by CFI-EFI

Since the present pump can maintain pressure, as evidenced by straight line performance, the only noticeable additional flow a 85-91 fuel pump will provide will be from your wallet, buying an unneeded pump.

RACE ON!!!

Yep, if the current pump keeps needed pressure already, changing to a later pump will do nothing but make you poorer. And I'm betting there is something going on with your pickup assembly as well. Test your fuel pressure and see what you have. In fact, CLAMP everything snugly, tape the gauge to your windshield, and go for a drive. See if you can get it to replicate the problem and if/when it does, note what the guage does.

If your pressure is still falling off with a full tank, pull the pump assembly and inspect. I'm betting CFI is right on target...pump has come loose, and / or the filter sock is clogged, or something funky is going on inside your tank.

Remember, troubleshoot, don't throw parts (and $$$) at it.

Let us know what you find out.

Sep 6, 2008 | 11:11 PM

thewrenchhead

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I pulled the pump out,pump was in place and the sock was in place,sock had some debris on it ,but did find a small tear at the metal ring that goes into the pump approx. 1/2",may be the problem? might be a 24 year old pump also, so i'm gonna just change it for $60,will let everyone know how i make out!!Thanks again to all!!

Sep 7, 2008 | 02:47 PM

thewrenchhead

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Well got the pump in and don't see a problem,must have been the 24 year old pump!Thanks for the help!!

Sep 8, 2008 | 01:42 AM

Frizlefrak

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From: El Paso Texas

Quote:

Originally Posted by thewrenchhead

Well got the pump in and don't see a problem,must have been the 24 year old pump!Thanks for the help!!

Glad it's running right. I'm still wondering what was causing it though. Kinda odd for the pump to give good flow unless you're in a turn...assuming it's still submerged in fuel. May have had a wiring connection that was flaky. At any rate, if the problem is gone, don't argue with success.