Question: When cycling the throttle while cranking the engine, should you see a shot of fuel going into the throttle body, like you would on a carburated engine?

My buddy has this engine and is getting, what appears to be, no fuel. I told him to start by replacing the fuel filter, then move onto the pump in the tank.

Next question: Does the fuel tank for this engine have that "o" ring seal that a lot of earlier GM engines have, and can only be purchased at the GM dealer?

Next Question: I will most likely be replacing this pump for him (if that's the problem) any hints/tips I should know about removing and replacing the pump.

Next question: Is the Throttle body or fuel pump (I'm sure the pump is) electronicaly controlled? The reason I ask is, he said he came home from work one day for lunch and it was running good, then went to go back to work, and all it would do is turn over. So I'm wondering; with such a sudden change in the operating condition of the engine, should I be looking towards an electrical problem??

Next question: if he just turns the key to the "ON" position, should we hear the pump turn on??

PS: I will have him buy a haynes manual for this, so if some of these questions will be answered there, let me know.

Thanks in advance :D:D

the engine requires air, fuel and spark to run, take away one and it won't start. if it has air and spark, pour a small amount of gasoline into the throttle body, crank it over and see if it starts for a few seconds and then dies. if it does you are not getting fuel from the throttle body. do not try to keep the engine running by dumping more gas in after it starts, you can be burned very easily. the fuel pump and throttle body are both electrically controlled by the engine ecm, the throttle body does not have an accelerator pump, so you will not get a 'squirt' of fuel when working the throttle. if it doesn't try to run on the gasoline it could have jumped time due to a worn timing chain, there are a lot of possiibilities if it is a fuell problem.

Thanks for the info, that actually helps quite a bit.

Anyone else??

Originally posted by Cliffhanger
Question: When cycling the throttle while cranking the engine, should you see a shot of fuel going into the throttle body, like you would on a carburated engine?

No but you can put a piece of paper under one of the injectors while cranking and if the injector is spraying fuel you will see it on the paper

[i]My buddy has this engine and is getting, what appears to be, no fuel. I told him to start by replacing the fuel filter, then move onto the pump in the tank. [/B][QUOTE]

you may be a little premature here

[QUOTE][i]Next question: Does the fuel tank for this engine have that "o" ring seal that a lot of earlier GM engines have, and can only be purchased at the GM dealer? [/B][QUOTE]

yes it has an O ring.. I reuse the O ring unless it has hardened or is otherwise damaged

[QUOTE][i]Next Question: I will most likely be replacing this pump for him (if that's the problem) any hints/tips I should know about removing and replacing the pump.[/B][QUOTE]

make sure the tank is empty before you drop it

[QUOTE][i]Next question: Is the Throttle body or fuel pump (I'm sure the pump is) electronicaly controlled? The reason I ask is, he said he came home from work one day for lunch and it was running good, then went to go back to work, and all it would do is turn over. So I'm wondering; with such a sudden change in the operating condition of the engine, should I be looking towards an electrical problem?? [/B][QUOTE]

the whole thing is electronically(computer) controlled

[QUOTE][i]Next question: if he just turns the key to the "ON" position, should we hear the pump turn on?? [/B][QUOTE]

It should run for a couple of seconds to pressurize the fuel system

[QUOTE][i]PS: I will have him buy a haynes manual for this, so if some of these questions will be answered there, let me know.

Thanks in advance :D:D [/B]

that should have been your first step..

Check your ECM fuses.


To make fuel pump replacement easier, cut a hole in the bed over the top of the sender!

Originally posted by FYRMAN
Check your ECM fuses.


To make fuel pump replacement easier, cut a hole in the bed over the top of the sender!

Fuses crossed my mind after talking to my buddy last night.

I don't know if he'd be too keen on cutting a big (to him) hole in his P/U bed :eek: he's not one of "US" in that way :D

Thanks again. :beer: