1987 TBI fuel pump issue

[Jiblackledge]

I have a 1987 chevy R20 with the 350 TBI and dual tanks, the right tank fuel pump was bad, I ordered a new one and installed, drove the truck and during hard acceleration it seams as though it is not getting enough fuel, when I swap to the left tank it does not do that and I can get in it and it will accelerate with no issues, I'm wondering if the new fuel pump can not keep up and should I replace it with another. Aslo the truck is completly stock.

 

[Rusty Nail]

They don't got no pictures? Dude. It's the internet.
What color is it?!

 

[Ricko1966]

I have a 1987 chevy R20 with the 350 TBI and dual tanks, the right tank fuel pump was bad, I ordered a new one and installed, drove the truck and during hard acceleration it seams as though it is not getting enough fuel, when I swap to the left tank it does not do that and I can get in it and it will accelerate with no issues, I'm wondering if the new fuel pump can not keep up and should I replace it with another. Aslo the truck is completly stock.

Make sure none of the hoses got kinked or crimped,try running it with no gas cap. Post back.

 

[fast 99]

Hope you purchased a Delphi pump.

 

[Jiblackledge]

I did purchase a delphi pump and I was very careful to make sure the hoses were not kinked or crimped because the tank has to be dropped and I also lifted the bed off so that I could check the hoses after I put the tank back in. So this is why I'm a little confused. The left side no issue but the right side with new pump it has issues.

You must be registered for see images attach

You must be registered for see images attach

 

[Redfish]

Is the switching valve working properly? They do go bad eventually.

 

[Jiblackledge]

I think it is, it does switch back and forth between the tanks, and the truck does cruise when the right tank is chosen, its when I try to accelerate to pass or just want to get on it, it acts as if it is not getting enough fuel. How would I check the switch.

 

[Ricko1966]

I think it is, it does switch back and forth between the tanks, and the truck does cruise when the right tank is chosen, its when I try to accelerate to pass or just want to get on it, it acts as if it is not getting enough fuel. How would I check the switch.

I hate to tell you this there is no easy diagnoses for this. You could have poor contacts in the switching,you could have a switching valve that leaks internally,you could have a bad connection at the tank or at the pump. First I think I'd wiggle my tank connections,then bypass the valve. Then I'd bypass electric switch to tank then I'd drop the tank and inspect for a bad connection,trash in the tank,a broken baffle.

 

[Rusty Nail]

Good thing you got them pix, it's a good lookin truck!

 

[gmbellew]

also check the fuel pressure on that pump....

 

[Ricko1966]

I did purchase a delphi pump and I was very careful to make sure the hoses were not kinked or crimped because the tank has to be dropped and I also lifted the bed off so that I could check the hoses after I put the tank back in. So this is why I'm a little confused. The left side no issue but the right side with new pump it has issues.

You must be registered for see images attach

You must be registered for see images attach

also check the fuel pressure on that pump....

Check pump pressure at the tank. A switching valve that's bypassing will show low pressure,but not the pumps fault

 

[Jiblackledge]

Thanks for the advice, I'll give that a try and see what I get for pressure.

 

[Rusty Nail]

Yeah.Whack on it with a hammer.A little bit.

I'm Protecting The Community!

You must be registered for see images attach

 

[Jiblackledge]

Just a little update, I removed the shield from the selector switch, and it was leaking, so I have one coming and going to give that a shot before dropping the tank and changing the pump.

 

[Jiblackledge]

I changed the fuel tank selector valve and the problem is fixed, took the truck out for a test ride and no hesitation or stumbling, just press the accelerator pedal and it will get up and go. Thanks for the advice and I hope that this can help someone in the future.