Last post on Nov 24, 2013 at 1:32 PM
You are in the GMC Safari & Chevy Astro
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Chevrolet Astro, Fuel System, Van
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#4 of 219 have problems my van its leaking gas
Nov 13, 2006 (4:53 pm)
I have a 1995 gmc safari... they recently change water pump, gas pump and filter but now its leaking gas down the exhaust.... does any one know why this is happening .... my van its been parked on my drive way for too long now and i miss it very much i need to get it running again before starts snowing please if anyone knows i will appreciate any recomendations.... i heard it could be the fuel presure regulator... what u think???
#5 of 219 GMC Safari fuel pump
Nov 25, 2006 (8:02 pm)
Ok, people. I am new this. I am in dire need and I need help. I need a fuel pump for my 1998 GMC SAFARI. Problem is...they are prohibitively expensive and I am a poor parent of 3 children with 1 in college. Anyone has any idea on how to fix/replace the fuel pump in a fashion affordable to me? Thanx so much. Bye.
#6 of 219 93 Chevy Astro won't start?
Dec 06, 2006 (12:48 am)
My 93 Astro 4.3L quit running one day and won't restart. It has 60 psi of fuel pressure and plenty of spark. It also shows a code 43 which is the electronic spark control system faulty. Replaced the ignition module to no aveil. Anybody have the same problem?
#7 of 219 Re: GMC Safari & Chevy Astro - Fuel Issues [cargob00m]
Dec 12, 2006 (7:30 pm)
I have the same problem with my 2000 astro when it rains the fuel pump doesn't get any voltage. Please if anyone knows why please post it . Thank you
#10 of 219 no start problems continue...
Dec 14, 2006 (5:01 pm)
SO this test is to place a piece of wire or metal(something that will stay in place on it on...like an alligator clip and then hold the boot with a well insulated screwdriver (as in drapped over it ) and gradually move the tip away from the grounded metal surface.(Would insulated pliers help me hold/control it better?---If this is not a good result should I look at new wires or plugs(different brand or premium platinum) that give a better spark or what would help this? Or is there another part which provides this spark. I replaced the ignition coil already.
If the fuel presssure leaks down before a couple of minutes does that mean the injectors are not providing enough fuel long enough? Could their signal be dropping out too soon or are they bad. Could this be the fuel pump. I heard from another mechanic that this system had lots of problems and has been updated. He was lobbying for work but did say as you that if I am going to do the work myself that to make sure I check everything out before I invest in the updated injectors system. Last time I checked it was about $520.00 and I think its a dealer only item. This current system is CMFI on the 1995 I have. In 1996 they went to CSFI and if it retrofits (and this is the solution maybe I could find a slavage one . The bad news would be if they just changedthe CMFI and only new will work.
On the Explorer I was checking the IAC valve. Since I cleaned it out(carbon buildup) the idle is doing as you describe. It does go to about 1100 before settling down to about 600rpm. It actually was racing up before. I will continue to observe this and if it continues or reoccurs I will clean it again. It may need to be replaced. The TPS (throttle position sensor also had inconsistent voltage but with this improvement it may have nothing to do with the surging/racing idle at this point.
#11 of 219 Re: no start problems continue... [fixitrod]
Dec 15, 2006 (6:43 am)
"If the fuel presssure leaks down before a couple of minutes does that mean the injectors are not providing enough fuel long enough? Could their signal be dropping out too soon or are they bad. Could this be the fuel pump."
The fuel pressure leaking down means that the fuel injectors are leaking or their is a leak somewhere in the system. The leaking injectors can cause some flooding of the cylinders, depending on how bad it leaks, because the leaking fuel injector never completely closes and squirts some fuel when it supposed to be closed. The Fuel pressure should NOT leak down, but hold the same pressure for several minutes if the system is "tight" and not leaking. Most common leakage is through the injectors, there could be one or more that is not sealing closed due to dirt in the injector or a sticking injector. In these cases, inspection and cleaning of the injectors is recommended. Other sources of leakage (not common) can be leaking backpressure through the fuel pump or and an external leak. Sometimes the injectors short out and don't open, then it makes that cylinder run lean. I'm glad I drive a Ford, you may notice that the Fords seldom, if ever, have any fuel injection problems.
On your Explorer, the IAC are common to need cleaning or replacement, poor idle is usually IAC or EGR system or vacuum leak.
On my Explorer, my 2000 V8 5.0L is starting to give me a P0401 DTC, EGR insuffient flow, so I'll be having to clean the EGR and passages, maybe have to replace the Dpfe.
#12 of 219 Re: no start problems continue... [electricdesign]
Dec 15, 2006 (9:30 pm)
The plan is to continue with the spark quality and further investigate the "leaking " of the fuel injector system after doing a leak down test on the Safari. This van was a freebie out of my father-in-laws shuttle service fleet and with the money I spent on getting it up to speeed I'll have just about bought it. Its probably going on the sale block as soon as I get it running...getting to the diminishing returns level.
Its been a couple of days since I cleaned the Explorers IAC valve and the idle has been consistent so thats a good sign.
We also have a 1998 V8 5.0L and I got that code and and it was the Fuel vapor management hose that was damaged. The unit itself broke while changing the hoses.They and the valve attachments are plastic and this truck has over 200K. It would be nice if I can help you with this information.
#13 of 219 Re: no start problems continue... [fixitrod]
Dec 16, 2006 (6:43 am)
"We also have a 1998 V8 5.0L and I got that code and and it was the Fuel vapor management hose that was damaged. The unit itself broke while changing the hoses.They and the valve attachments are plastic and this truck has over 200K. It would be nice if I can help you with this information."
That' nice but it's not a problem right now, it can wait a month or so until I have time to get to it. Right now we have all this Christmas stuff going on, and I just don't have time for anything, unless it's an emergency.
Keep me posted on the GMC cause Im curious at to what you find, since we've been through almost everything so far.