Installed New Walbro pump...car ran fine for 5 minutes then quit..wont start

**Hamster Dance** · 01-12-2006, 08:44 AM

Had fabulous pressure coming out of schrader valve, I whooped it up and my buddy and me went for a short drive...
pulled back in my driveway and the car sputtered off...wouldnt restart
checked the schrader valve and gas squirting out strong...
car ran like a champ for a few minutes...
WTF!! What the hell happened?

still cant get it to start!!!
did see some smoke coming out of the throttle body..only clue I have
any quick responses would help!!

edit: 95 Z28 LT1 engine, lol

**02z28ls1** · 01-12-2006, 08:51 AM

check to see if it come unplugged from the lead by the tank.See if you can borrow a fuel pressure guage from somewhere or buy one-there are inexpensive ones.It should be up to pressure when cranking (probably around 60 psi)You should be able to hear the pump run the first second or so when turning on the key-no sound means no pump-hopefully it's ok and it just came unplugged-let us know what happens.........

**Hamster Dance** · 01-12-2006, 08:56 AM

Originally Posted by 02z28ls1

check to see if it come unplugged from the lead by the tank.See if you can borrow a fuel pressure guage from somewhere or buy one-there are inexpensive ones.It should be up to pressure when cranking (probably around 60 psi)You should be able to hear the pump run the first second or so when turning on the key-no sound means no pump-hopefully it's ok and it just came unplugged-let us know what happens.........

I have plenty of fuel pressure up to the shrader valve by the engine...
no thats not the problem...

the pump is brand new...

**BIG D's SS** · 01-12-2006, 09:05 AM

Originally Posted by Hamster Dance

I have plenty of fuel pressure up to the shrader valve by the engine...
no thats not the problem...

the pump is brand new...

Just because it is new doesn't mean anything.

**Hamster Dance** · 01-12-2006, 09:09 AM

Originally Posted by BIG D's SS

Just because it is new doesn't mean anything.

Maybe the 42 lbs of fuel pressure doesnt mean anything either...

enough laughs, I am checking if my EGR valve is stuck open...
would that prevent if from starting?

**BIG D's SS** · 01-12-2006, 09:12 AM

Originally Posted by Hamster Dance

Maybe the 42 lbs of fuel pressure doesnt mean anything either...

enough laughs, I am checking if my EGR valve is stuck open...
would that prevent if from starting?

I took my egr off without it being deleted and it still started. Have you still got spark?

**Hamster Dance** · 01-12-2006, 09:15 AM

Originally Posted by BIG D's SS

I took my egr off without it being deleted and it still started. Have you still got spark?

How do I check spark?

**BIG D's SS** · 01-12-2006, 09:18 AM

Originally Posted by Hamster Dance

How do I check spark?

Just take a plug and hook it up on a plug wire and see if it is sparking. Lay it over where it will arc and have someone spin the car to see if you have fire. That is the way I do it.

**Hamster Dance** · 01-12-2006, 09:22 AM

Shit!! My buddy was holding the wire and told me to crank it...
I did and I heard screaming...

I have to go see what is going on...the hood blocked my view...

**BIG D's SS** · 01-12-2006, 09:52 AM

Originally Posted by Hamster Dance

Shit!! My buddy was holding the wire and told me to crank it...
I did and I heard screaming...

I have to go see what is going on...the hood blocked my view...

If it shocked him then you have fire.

**toneloc60** · 01-12-2006, 12:42 PM

Smoke out of the throttle body??? Was it smoke, or fuel vapor?

**Hamster Dance** · 01-12-2006, 02:15 PM

Originally Posted by toneloc60

Smoke out of the throttle body??? Was it smoke, or fuel vapor?

Maybe fuel vapor...white...is my best guess...
unless I am mistaken...
I am trying to just put the key in the on position without starting,
then disconnecting the negative battery cable for a half hour or so
to reset the PCM...

Will that work?

**02z28ls1** · 01-13-2006, 02:22 AM

You know-people are trying to help you and you are laughing and yawning at their suggestions-and then you ask if the EGR will be the problem-to a professional mechanic such as myself- that IS hilarious.If you don't have a clue what you are doing and are going to have a bad attitude about the help you get then call a tow truck and pay somebody to fix your mistakes -because I can see from here what the problem is.

99PontTA · 01-13-2006, 04:13 AM

Originally Posted by Hamster Dance

Shit!! My buddy was holding the wire and told me to crank it...
I did and I heard screaming...

I have to go see what is going on...the hood blocked my view...

LMAO

**02z28ls1** · 01-13-2006, 09:18 AM

Another serious note-the spark from a modern ignition system is strong enough to kill someone-it can stop your heart. ^ which would make you stop screaming....obviously he's trying to be entertaining-I'll be entertained if his car is still broke-lol

99PontTA · 01-13-2006, 10:36 AM

Originally Posted by 02z28ls1

Another serious note-the spark from a modern ignition system is strong enough to kill someone-it can stop your heart.

or make you scream

**Hamster Dance** · 01-14-2006, 04:22 PM

Update:
Had it towed to Tuffy, said that only one cylinder was firing up due to excessive gas in the intake...
They want $1400 to change all plugs, wires, water pump (even though I havent seen any leaks and no overheating, what a lie, just changed the water pump at Pep Boys 2 years ago) cap and rotor, oil change and whatever...
My plan is to just change the plugs myself and maybe the cap and rotor...
He stated the coil was firing fine and plenty of gas coming out of the shrader valve...
1 out of 8 cylinders due to being gas saturated spark plugs?
Please help me with my dilemna...
They said they cant scan the car, due to it not starting up...
Are they trying to take me for $1400?
Will replacing the "gas soaked" plugs and cap and rotor get it started?

Wont the gas evaporate in the intake after a while?
I have no problem replacing the plugs....

**Sarge** · 01-14-2006, 05:23 PM

You sure they didnt say $140 dollars there chief....

**Hamster Dance** · 01-14-2006, 06:15 PM

Originally Posted by Sarge

You sure they didnt say $140 dollars there chief....

Do you think I would actually confuse $1400 with $140?

For changing plugs, wires, cap, rotor, water pump and oil change?
We would all do that for that price immediately,
whether we needed it or not....
Answer your question, chief?

If you were serious, or kidding, an absolute moronic statement...