help with a chevy

blazerbrad · 06-20-2008, 12:04 PM

Have you checked for any codes? The first step I would do is check the fuel pressure, should be able to borrow rent a gauge and I'm assuming there is a test port somewhere around the intake.

Did it start doing this before or after all the parts you listed were installed?

06-20-2008, 03:02 PM

its not getin the right fuel pressure i had a 88 that did the same thing ethier the pump u put in there is bad or the little rubber hose that conects the pump to the cindig unit may have a crack or the clamps might not be tight and gas could be leakin out the hose

pete · 06-20-2008, 06:25 PM

this was doing this before all the new stuff. have checked fuel pressure and it is right were the book says it should be. also have checked the little line you say with the pressure and it does not loose any pressure. it acts like it is choking out or starving. thanks for all the input willing to try anything need to get this to run.also it is not throwing any codes. jason came over last night and we still couldnt figure it out. thanks pete

94Dodge Truggy · 06-26-2008, 10:27 PM

TPS switch possibly? Wiring problems? Sounds like a hard one to figure out!

xj-up · 06-27-2008, 03:25 AM

Its sound like a fuel pump problem. How new is the current pump.
At idle there is no load on pump but, driving it normal heats it up and slowly shuts down until it cools and then truck will start. I have replaced many Chevy pumps having these same problems.

Also check to see if you have any smashed or kinked fuel lines.

Later,
Shane

jeepmanjeff · 06-27-2008, 05:53 PM

My guesses would be:

Throttle position sensor, check the voltages closed and full open (naturally with the engine not running)
Temperature sensor, this will control to a degree leaness for fuel.
Map Sensor: drop in pressure will greatly affect the motor. More load could be loss of pressure. Possibly cracked hose you can't see.
IAC Idle Air Control. this will affect how much air fuel mixture you get. You said it acted like it chokes out...THIS COULD VERY WELL BE IT. Could be stuck in a open or closed state.All else fails after these...go to junk yard and get duplicate ECM. Computer could have taken a surge and messed up eprom.

pete · 06-29-2008, 12:29 AM

FINALLY got it figured out. it was the spider. went to pull and pay and got one put it in and it runs great. thanks everybody for all the suggestions. thanks pete

06-20-2008, 06:25 PM	#3
pete Join Date: Mar 2008 Location: sharonville Posts: 26	this was doing this before all the new stuff. have checked fuel pressure and it is right were the book says it should be. also have checked the little line you say with the pressure and it does not loose any pressure. it acts like it is choking out or starving. thanks for all the input willing to try anything need to get this to run.also it is not throwing any codes. jason came over last night and we still couldnt figure it out. thanks pete Last edited by pete; 06-20-2008 at 06:34 PM.

06-26-2008, 10:27 PM	#4
94Dodge Truggy EX-Vice President Join Date: Jan 2007 Location: Fairfield, Ohio Posts: 3,048	TPS switch possibly? Wiring problems? Sounds like a hard one to figure out! __________________

06-27-2008, 03:25 AM	#5
xj-up Jeep XJ Join Date: Jul 2007 Location: Hamilton, Ohio Posts: 76	Its sound like a fuel pump problem. How new is the current pump. At idle there is no load on pump but, driving it normal heats it up and slowly shuts down until it cools and then truck will start. I have replaced many Chevy pumps having these same problems. Also check to see if you have any smashed or kinked fuel lines. Later, Shane __________________ 90' Jeep XJ Buggy - 5.5 custom lift, 33" TSL's, locked 01' Softail 01' Dodge Ram Cummins 3500 4X4 71' Dodge Challenger Shane

06-27-2008, 05:53 PM	#6
jeepmanjeff Ah Unz ze President! - CORE Member - - Moderator - Join Date: Jan 2007 Location: Fairfield Ohio Posts: 588 Images: 343	My guesses would be: Throttle position sensor, check the voltages closed and full open (naturally with the engine not running) Temperature sensor, this will control to a degree leaness for fuel. Map Sensor: drop in pressure will greatly affect the motor. More load could be loss of pressure. Possibly cracked hose you can't see. IAC Idle Air Control. this will affect how much air fuel mixture you get. You said it acted like it chokes out...THIS COULD VERY WELL BE IT. Could be stuck in a open or closed state.All else fails after these...go to junk yard and get duplicate ECM. Computer could have taken a surge and messed up eprom. __________________ Keep them on all 4's

06-20-2008, 12:04 PM	#1
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	Have you checked for any codes? The first step I would do is check the fuel pressure, should be able to borrow rent a gauge and I'm assuming there is a test port somewhere around the intake. Did it start doing this before or after all the parts you listed were installed?

06-20-2008, 03:02 PM	#2
jeepbmxin Guest Posts: n/a	its not getin the right fuel pressure i had a 88 that did the same thing ethier the pump u put in there is bad or the little rubber hose that conects the pump to the cindig unit may have a crack or the clamps might not be tight and gas could be leakin out the hose

06-29-2008, 12:29 AM	#7
pete Join Date: Mar 2008 Location: sharonville Posts: 26	FINALLY got it figured out. it was the spider. went to pull and pay and got one put it in and it runs great. thanks everybody for all the suggestions. thanks pete