Last post on Feb 23, 2013 at 8:21 AM
You are in the GMC Safari & Chevy Astro
What is this discussion about?
GMC Safari, Chevrolet Astro, Van
#1963 of 1972 Re: '04 Surging Motor [the_big_al]
Feb 28, 2012 (10:33 am)
Sounds like a fuel pump/fuel issue. I have never had wait for a modern vehicles fuel pump to pressurize before starting. It may just be the wire harness going to the pump. GM had some issues with fuel pump wiring on pickups and vans from the 90s and the Astro was pretty much unchanged from 1995 until it's death in 2005.
#1964 of 1972 Re: '04 Surging Motor [cob]
Feb 28, 2012 (12:56 pm)
but why would a fuel pump cause surging? a rough idle I could understand, but this is a surge. It surges from almost dying to about 600 RPM at idle. It does not surge while at speed or while feeding it fuel. My statement about letting the fuel pump pressurize might be mis-leading a bit. That is generally the length of time I let it sit before firing it up. You're right though in that I too have never had to wait for a fuel pump to pressurize. I just generally get in and fire away no matter the vehicle aside from diesels.
One of the other things that it will do is that if is exhibiting issues, is that when I rev it then let off the gas, it will idle all the way down to almost dying and then usually it will die. Or sputter and come very very very close to dying and only by feathering the gas can I keep it alive. Again though, cycling the key off and then back on will generally cure all issues.
Could it be an idle control valve??
#1965 of 1972 Re: '04 Surging Motor [the_big_al]
Feb 29, 2012 (10:42 am)
Have you tried ready the codes from the computer to see if there is a problem with a sensor? Does the check engine light come on while it is running rough? You could also pull the neg. battery cable for 30 min to reset the system to see if it helps. Make sure to read the codes first because resetting the system will erase anything stored. I would try that before swapping out any parts.
#1966 of 1972 Re: '04 Surging Motor [the_big_al]
Feb 29, 2012 (11:09 am)
I had simlar issues with my 2001 safari, 4.3 l engine. It, surprisingly enough, turned out to be the fuel pump. I would take it to (I cannot believe what I am about to say) a Chevy dealer and have their mechanics check it out. The dealership was my last resort but this might have been the one case in my life where I should've gone there first. They did a pressure test on mine and I think a vacuum test and it was a fuel pump issue. I replaced it and the trouble corrected.
#1967 of 1972 Re: '04 Surging Motor [cob]
Feb 29, 2012 (3:13 pm)
The only code it will throw intermittently is a mass airflow sensor code. It comes and goes and does it while driving. Not sure why it is throwing that particular code. I have swapped out 2 different mass air flow sensors and it still throws the code. No other codes are present.
#1968 of 1972 astro running deep
Mar 04, 2012 (11:56 pm)
I am a owner of a 1994 Chevy Astro EXT CL version which i bought brand new no major problems almost 300,000 miles on it in still running deep.link title
#1970 of 1972 1995 GMC safari
Sep 24, 2012 (4:14 pm)
Driving my 1995 GMC safari home stopped at light it "chugged" and died now it will not start again. Sound like it wants to new battery and fairly new starter.
any help would be great
Sep 29, 2012 (3:55 am)
I also have stalling problems when restarting within 5-10 minutes of turning engine off. Am happy with the features of the van, but very concerned about the reliability. Have been in 4 times in under 20,000 miles for the injectors only. Would be curious to know how t2muchjam got to the arbitration point. I wrote a complaint letter to GM last fall and received a form letter extending the warranty on the injectors only to 100,000 miles. Haven't followed up again, and now this past Thursday, it happened again.
cheap plus one
#1972 of 1972 rear door conversion
Feb 23, 2013 (8:21 am)
I just purchased an '88 Safari van that has the split rear windows, and I've noticed that some of the newer vans have a full rear window with the split doors below. I was wondering if I could convert it to this with no problems, as I don't like the blind spot back there.
I parked next to a newer SLE model just a few minutes ago that had them, and it looks like it can be done. The split doors seems to have the hinges in the same place. I'm concerned about the top full window.