help with a chevy

pete · 06-19-2008, 10:30 PM

anybody have any suggestions. I have a 95s10 that i cant figure out. it runs perfect at a idol but if you run it above 3500 rpm it starts acting up and dies then its a ***** to get it to restart. after it restarts it runs fine at a idol again. it has a new fuel pump, fuel filter, rotor button, wires, cap, pu coil, any ideas would be greatly appreciated thanks pete

itbrokeagain · 06-19-2008, 11:32 PM

We have a 3500 van at work that goes through fuel relays like crazy. We have checked the entire fuel wiring system and replace the pump but that didnt help. Check the relay. Maybe its on its way out.

JasonCJ7 · 06-20-2008, 10:40 AM

Check the fuel filter, it may clogged and cause a fuel restriction.

icemanjes · 06-20-2008, 10:48 AM

Check your ground wires also.

fabricator · 06-20-2008, 11:04 AM

fuel pressure regulator ?

jfiscus · 06-20-2008, 12:59 PM

damn thing will idle there forever, starts right up every time unless you killed it with higher rpms the last time. purrs idling, no miss or anything. has me stumped too.

blazerbrad · 06-20-2008, 01:04 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, 04:02 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, 07:25 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, 11:27 PM

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

xj-up · 06-27-2008, 04:25 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, 06:53 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, 01:29 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

itbrokeagain · 06-29-2008, 09:21 AM

?????

jeepmanjeff · 06-30-2008, 04:03 PM

what is a spider?????

jfiscus · 06-30-2008, 04:11 PM

a spider is a complicated fuel injector inside of these chevy motors. not tha thard to replace but can cause all sorts of problems when it goes bad.

06-19-2008, 10:30 PM	#1
pete Join Date: Mar 2008 Location: sharonville Posts: 26	help with a chevy anybody have any suggestions. I have a 95s10 that i cant figure out. it runs perfect at a idol but if you run it above 3500 rpm it starts acting up and dies then its a ***** to get it to restart. after it restarts it runs fine at a idol again. it has a new fuel pump, fuel filter, rotor button, wires, cap, pu coil, any ideas would be greatly appreciated thanks pete

06-19-2008, 11:32 PM	#2
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	We have a 3500 van at work that goes through fuel relays like crazy. We have checked the entire fuel wiring system and replace the pump but that didnt help. Check the relay. Maybe its on its way out. __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

06-20-2008, 10:40 AM	#3
JasonCJ7 Throttle Jockey Join Date: Jan 2007 Location: Liberty Twp., Ohio Posts: 182	Check the fuel filter, it may clogged and cause a fuel restriction. __________________ 78 CJ-7, 350 V8, T-18a Tranny, Twin Stick Dana 300, Scout 44's, 4.27 Gears, 36" TSL's, Welded rear and Full Spool Front, Hi-Steer with GM Knuckles

06-20-2008, 10:48 AM	#4
icemanjes Icemanjes Join Date: Jan 2007 Location: Hamilton Posts: 55 Images: 169	Check your ground wires also. __________________

06-20-2008, 11:04 AM	#5
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	fuel pressure regulator ? __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

06-20-2008, 12:59 PM	#6
jfiscus Terrain Stomper Join Date: Feb 2007 Location: Crittenden, KY Posts: 633	damn thing will idle there forever, starts right up every time unless you killed it with higher rpms the last time. purrs idling, no miss or anything. has me stumped too.

06-20-2008, 01:04 PM	#7
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, 04:02 PM	#8
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

06-20-2008, 07:25 PM	#9
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 07:34 PM.

06-26-2008, 11:27 PM	#10
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, 04:25 AM	#11
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, 06:53 PM	#12
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

06-29-2008, 01:29 AM	#13
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

06-29-2008, 09:21 AM	#14
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	????? __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

06-30-2008, 04:03 PM	#15
jeepmanjeff Ah Unz ze President! - CORE Member - - Moderator - Join Date: Jan 2007 Location: Fairfield Ohio Posts: 588 Images: 343	what is a spider????? __________________ Keep them on all 4's

06-30-2008, 04:11 PM	#16
jfiscus Terrain Stomper Join Date: Feb 2007 Location: Crittenden, KY Posts: 633	a spider is a complicated fuel injector inside of these chevy motors. not tha thard to replace but can cause all sorts of problems when it goes bad.