Loss of power during left turns

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Loss of power during left turns

Reply #15 – October 19, 2011, 01:16:28 AM

I pulled my pump out tonight to check the hose and baffle. both seemed to be fine. My baffle was made of plastic. I also used my air compressor to pressure test the hose against the check valve. All looked good. I'm gonna get some new injectors to see if that's where the fuel pressure is going when i turn the key off.

this was the pressure test

The hole i cut in the trunk floor so i dont have to drop the tank to service the pump

Loss of power during left turns

Reply #16 – October 19, 2011, 06:47:19 AM

OK you checked the tank and related components. Did you check the pump for delivery VOLUME?? And Pressure?? How about the tank VENT and charcoal canister?? And the Gas cap?? I know this is picking at straws and sounds DUMB but you never KNOW. Either way i think you ruled out the tank components. Are you loosing shut down pressure?? And how long does the pressure hold for?? I would think that at this point it is not fuel related. Why would it not do it on a right hand turn?? This is nuts and i find it rather BIZARRE. An EFI system does not care about G force if the pump is surrounded by FUEL. Could something be shifting like a wiring harness touching the BODY??? I would love to see what this car is doing in person because it is NUTS. Good luck

Most of the baffles i have seen are made of some kind of PLASTIC.

Loss of power during left turns

Reply #17 – October 19, 2011, 07:47:22 AM

That's weird. All my tanks had metal baffles. I learned something new about plastic baffles.

Loss of power during left turns

Reply #18 – October 19, 2011, 09:43:40 AM

Both tanks I have had in the Bird have had metal baffles and the on in the Coupe is also a metal baffle. Never heard of a plastic baffle in a fuel tank in the 80's or 90's so that is definitely interesting.

Darren

Loss of power during left turns

Reply #19 – October 19, 2011, 09:55:51 AM

Did a quick search and evidently the GM's had it in the third generation Cameros, TA's, and Firebirds. From what I can tell the Mustangs have the plastic ones but its later in the SN95 models. Could not find anything on the Thunderbirds but thats nothing new.

Darren

Loss of power during left turns

Reply #20 – October 19, 2011, 01:54:36 PM

Quote from: bryan163;370537

I pulled my pump out tonight to check the hose and baffle. both seemed to be fine. My baffle was made of plastic. I also used my air compressor to pressure test the hose against the check valve. All looked good. I'm gonna get some new injectors to see if that's where the fuel pressure is going when i turn the key off.

If it were the injectors you'd likely have a flooding condition when hot(at least on one cylinder), I'd bet on the regulator... Still fuel pressure bleeding off isn't likely to cause any problem other than longer crank times when cold... Just flip the ign sw on, wait two seconds then crank...

Loss of power during left turns

Reply #21 – October 19, 2011, 06:47:55 PM

[QUOTE=Aerocoup

Loss of power during left turns

Reply #22 – October 20, 2011, 10:06:34 PM

, I just noticed you are in CT Tom. You're welcome to stop by our shop in Glastonbury any time. I hang out there just about every night working on my cars. I do have a FP gauge under the hood, but I can't see it when I'm driving the way its set up now. I am loosing pressure rapidly after shutdown. It goes to zero within 5 seconds. My regulator is an Aeromotive. I guess I could pull the pump while someone shuts the car off and see if fuel continues to flow from the return line back to the tank.
As far as the loss of power under heavy G's, I still think the baffles are failing to keep fuel near the pump. It doesn't usually starve till half way through the second donut, which would probably give the fuel time to drain out of the baffles. I think filling the tank completely might eliminate that problem. I haven't had more than a 1/2 tank since I started driving the bird again. Its been in storage for a few years.