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Chevy Blazer/GMC Jimmy

487 messages,  Last post on Sep 30, 2008 at 1:54 PM

You are in the Chevrolet Blazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet Blazer, GMC Jimmy, SUV


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#407 of 487
Re: 2003 chevy blazer idle problem [tothetee2] by repairdog
Dec 02, 2006 (2:01 am)
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Replying to: tothetee2 (Dec 01, 2006 2:10 pm)

In drive thats correct. Many have a slightly rough idle could be from many things: injectors get buildup of waxy crap from cheap gas, cap/rotor, plugs, wires, fuel filter, sensors degraded (O2, MAF, temp, etc), vacuum leak, idle air control valve, clogged air filter, and each has to be looked at. Sorry no easy answer. Can relate to area, mileage, and driving habits.
#408 of 487
Re: 2000 jimmy starting issue [repairdog] by corbynova
Dec 02, 2006 (3:19 pm)
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Replying to: repairdog (Dec 01, 2006 6:40 am)

No! It rarely makes it past 42 psi with KOEO then drops most of the time toward zero.The pressure keeps dropping as soon as the relay kicks off aftr 2 secs.It now will only start on ether an then refuses to stay running.Would this be the injector assy/regulator or fuel pump?I can`t afford to take it in for diag.thanks alot
#409 of 487
Re: 2000 jimmy starting issue [corbynova] by repairdog
Dec 03, 2006 (5:35 am)
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Replying to: corbynova (Dec 02, 2006 3:19 pm)

Here is a pic from Autozone of the fuel system.
http://autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/18/bc- /6f/0900823d8018bc6f.jsp
First is the battery voltage good, fuel filter new, and no fuel leaks in the lines? Need a min of 60psi to start as you have found out. Pump or regulator - pump over $500 and regulator $65. The regulator maintains pressure so a dealer uses a special tester with a valve that they can slowly crank shut and watch. Home mechanics temporarily squeeze the return line off at the flexible plastic section taking care to not damage it and not allowing the pressure to increase above 75psi or line damage may occur. If the pressure does increase the pump is probably good (holds pressure so good pump damper, check valve, and internal tank fuel line connections) and this points to the regulator return pressure spring (or to a leaking diaphram or injector poppet) If pressure does not increase past 60psi the pump is probably bad. After 2 sec the key must be off for 10 sec before it will operate the pump for an additional 2 sec prime.
#410 of 487
Re: 2003 chevy blazer idle problem [repairdog] by tothetee2
Dec 04, 2006 (11:11 am)
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Replying to: repairdog (Dec 02, 2006 2:01 am)

Thanks for the help. I have changed the plugs, wires, cap/rotor, fuel filter and air filter. Guess that narrows it down. I have 103K on it. Driving habits are all highway averaging 75 MPH. Could it be a timing issue?
#411 of 487
Re: 2003 chevy blazer idle problem [tothetee2] by repairdog
Dec 04, 2006 (2:43 pm)
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Replying to: tothetee2 (Dec 04, 2006 11:11 am)

Timing is fixed at distributor and adjusted by the computer. Do you ever lose any coolant from the reservior or see any leakage. Lower intakes are a known problem around 90-100k leaking some coolant into the valley so fill that up and watch it.
#412 of 487
Re: 2000 jimmy starting issue [repairdog] by dogle
Dec 16, 2006 (5:51 pm)
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Replying to: repairdog (Dec 03, 2006 5:35 am)

where is the fuel pressure regulator on a 2000 gmc jimmy 4.3 ltr engine?
#413 of 487
Re: 2000 jimmy starting issue [dogle] by repairdog
Dec 17, 2006 (4:30 am)
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Replying to: dogle (Dec 16, 2006 5:51 pm)

Under the plastic upper intake cover attached to the fuel injector assembly.
#414 of 487
Re: 2000 jimmy starting issue [repairdog] by dogle
Dec 17, 2006 (6:17 am)
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Replying to: repairdog (Dec 17, 2006 4:30 am)

Thanks I'll take a look.
#415 of 487
Power Door lock issues by bpotts
Dec 27, 2006 (11:53 am)
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My 1997 Jimmy has begun to lock and unlock itself after the it has been shut off. There is not a keyless entry on this vehicle and I have checked the fuse as well. I pulled the fuse in an attempt to operate it manually but when I pulled the fuse there was a whirring noise that was coming form under the dash intermittently. Not sure where to begin looking for this problem. Has anyone else experienced this?
#416 of 487
power door locks kaput! 1997 jimmy by ixmo
Dec 29, 2006 (2:33 pm)
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today i decided to give my 1997 jimmy a much needed bath. afterwards, my power door locks stopped working . could it be a fuse problem? , switch of some sort ? . im so low on funds and cant afford to be bent over by a dealer or mechanic. any ideas? please help.my neighborhood is not the best and the back tailgate door cannot be locked manually ,so tonight it will remain unlocked while i sleep. this sucks , the last thing my family needs is this right now.

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