Hey guys I have a problem and I thought I'd ask the experts. I have an 89 rs with the 305 which has been rebuilt. The tbi was switched to a quadrajet carb. Now it is dying out after going down the road about an eighth of a mile. It has a new electric furl pump and filter. It will idle just fine. It acts like it is running out of gas. Any suggestions would be GREATLY appreciated. Thanks

 

How is your fuel pump wired, and the lines connected?

 

Is your carb a computer-controlled carb? If you have a non-cc carb, you might want to chekc your mixture, sounds like what my carbed car was doing when it was running lean. Make sure your fuel pump has good power and ground, then look at your carb settings.

 

I think its just the Q-Jet thats being your problem.... These are always causing issues... I would suggest a Edelbrock, Holley, or Demon carb as well....

 

Thanks for the suggestion guys. I have replaced the carb with a different one and it still does the same thing. But now i have another problem. My neighbor told me that my intake gascket might be leaking so I tore it all apart to replace them and now that its back together I cant get any fire at all. I wasnt the one who put the fuel pump on so I really dont know how it is hoocked up. again thanks for the help.

 

Ditching the qjet is one of the worst mistakes you can make on an engine like this. The #1 problem I have seen with most Qjets, is the owner.

Have you put a fuel pressure gauge on this thing yet? What kind of new electric pump, in tank or external? If external, what about the in tank? Do yourself a favor and get that Qjet back on the car.

 

This is a FUEL DELIVERY problem. There is a restriction of some sort, somewhere in the fuel system. The problem IS NOT the carb. As was said by lj, about the worst mistake you can make, is to hack your car up and put on some other carb which will probably end up being "plumbed" with rubber line, only to discover that the problem is still there..... or maybe even worse. And then burn the car down for a fuel leak besides.

You say you have a "new electric pump"; is this the in-tank pump? Or is this an outboard pump, with the in-tank one still in there and just not running? Some of those don't do real well in a "suck through" situation. You might get alot better results with no outboard pump, and instead using the in-tank pump and a Mallory 4309 3-port regulator, set to 3-4 psi; instead of an outboard electric trying to suck through a restrictive in-tank unit.

You can verify that it's really fuel delivery by running the motor until it does its thing; then shut the motor off and pop it out of gear at the same time, so that the pump doesn't have a chance to refill the carb by letting the motor idle; and pulling off to the side of the road, and looking into the fuel bowl, and see if there's any gas in there. Probably you can just pull on the throttle and see if you can get more than about 2 pump shots. Remember, key to OFF, not LOCK.

The "advice" about Q-Jets being bad is some of the worst "advice" there is. Ignore that newbie crap and do some investigation.

 

My fuel pump is just the stock replacement in the tank. I just switched the carb to a different quadrajet that my cousin had. I think there is a problem with the fuel getting to the carb but what could it be. the new pump is making the buzzing sound when the key is on.