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
#1950 of 1972 can not add fuel
Jun 14, 2011 (10:09 am)
I have a 04 astro and I can not add fuel, it keeps coming back out like air is trying to escape. Tried trick it in; no dice, try every other gas station; no dice. Something is strange is going on here and any advice would be great. Yes I checked if there was anything plugging it, fished a door spring down the spout and it was long enough to reach the tank and no problem. I am so baffled I'm pissed off.....
#1951 of 1972 motor has fire and is getting gas to the check valve , but wont start
Jun 20, 2011 (10:13 am)
Hey guys , i have a 97 gmc safari with the 4.3 vortec , and the fuel pump went out , so i replaced it , and it ran fine for like 2 days , then it started missing , and running rough , through all drive cycles.
I also replaced all the plugs , wires , cap , button , filters , etc. , when i replaced the fuel pump.
Now I go out to start the van and nothing , the engines just turns over and wont fire off. I checked the fire , it has fire at the plugs , i checked fuel at the check valve , and there was fuel there , but i dont have a pressure gauge checker , but it squirted fuel to the back of the van when i realeased the pressure valve, so seems like plenty of fuel there . This is my only vehicle and is needed badly , daily ...
Please any help would be greatly appreciated.
#1952 of 1972 Re: motor has fire and is getting gas to the check valve , but wont start [dbird89]
Jun 20, 2011 (2:39 pm)
Your wiring sounds like it is off. Or you have a bad plug or both. Check your wiring and see if you have a crossed wire somewhere. That will cause a misfire, no fire and rough running. Also a bad plug will cause a misfire and rough running.
If you have fuel and spark, but no fire, then I highly suspect bad timing and since these newer motors can't be adjusted for timing, that leaves crossed wires somewhere. If the truck ran fine before you replaced stuff and the fuel pump went out, then go back over the things you replaced and test them out. Since it appears the fuel pump is good, check all the plugs, wires and cap and rotor. Somewhere in there is your problem since those are the things you touched before you had problems.
From my own experience, I just did plugs and wires on two different vehicles. One vehicle (an '87 Blazer with a 2.8 V6) I replaced the entire ignition system. It ran terrible before i started, then after replacing everything, I couldn't even get it to fire. It turned out that a previous owner had installed the distributor wrong and my wiring was 180 degrees off. I adjusted for that and the truck ran perfect.
I just did plugs and wires on my 04 Astro with the 4.3 and it was running terrible before I dove into it. Replaced all the plugs and wires and after, it still ran terrible. Even worse than before. I had a code reader with me and that helped to diagnose the problem. It turned out I had a mis-fire in the #2 cylinder bank. I pulled that plug and found a bad plug. Replaced that plug and it solved the problem. (it was also throwing a lean code, but that was related to the mass air flow sensor and wasn't affecting how it ran)
So start with the things you just replaced. Check all your wiring, check your connections, check the gap (although I think the plugs required are a platinum pre-gapped plugg), check your firing order (you did replace one plug and wire at a time right?) and check your cap and rotor to make sure they are good. I remember having to re-use an old cap and rotor once on my 4.3 S-10 awhile back because the new one was wreaking havoc on the system. Start with that and see if it will solve your problem...
#1953 of 1972 response to big al
Jun 28, 2011 (11:44 am)
hey big al, thanks for the reply , sorry i am just now getting back to ya , but have been overwhelmed , with my van still acting up and other stuff ...
i just wanted to let you know that , the van run fine for like 2 days after replacing fuel pump , and all the wires, etc, and then it starting acting like it did b4 the pump replacement , rough idling , missing at all drive speeds , but if you like, mashed the gas , a good bit , it will clear out and run fine .. no power loss , or nothing like that , just at cruise speed and constant pedal , the missing is evident ...
i rechecked all the plugs and gaps, and wires... gaps were fine , as mine calls to set at .60 , there was only one that was just a fraction off , reset them , all to correct specs... checked all wires for resistance , and they was in specs.. i have checked all the components , egr, pcv valve , iac, etc ... all are within the specs...
as i stated in early response , the van now just doesnt want to start ... but after cranking on it for a good long while , it finally started up, and ran pretty decent but , still has miss in it ... i just dont know what else to do , as i am unemployed and was trying to get by, by hauling scrap metal , but now that has stopped..
im scared to head out in it , afraid it will leave me on side of road somewhere !!! please , someone any info will , help to keep me from , burning this thing to the ground !! lol
thanks and will be waiting for reply .... peace and take care ... =)
#1954 of 1972 Re: response to big al [dbird89]
Jun 28, 2011 (5:20 pm)
Your problem most likely lies with the things you touched prior to it having problems. If all the plugs and wires are good, go to the fuel pump. It may be that you have a bad pump. After that, if that isnt the case, i'm not sure where to go from there. It could be an ECU issue too??
#1955 of 1972 Changing rear doors
Jul 19, 2011 (6:43 am)
What is involved in switching from Dutch to the 2 rear doors?
#1956 of 1972 Re: Changing rear doors [shoretyus]
Jul 23, 2011 (5:37 pm)
Go look at a dutch van and a regular rear door van. See if you can tell what the difference is. I believe some welding of the upper hinges might be in order? I'm only saying that because there dutch doors utilize the lower hinges, but the "hatch" part has hinges at the top of the van, not the upper sides. So I would assume that since the opening is the same for both types, you would need to retrofit the upper door hinges. If they are bolted in, the bolt holes may already be there, just need the hinges to bolt in.
#1957 of 1972 Re: I love my GMC Safari .... Please help with any hints [jun123]
Dec 13, 2011 (2:12 pm)
probably your fuel line... there's a connection above your exhaust, and if it leaks or corrodes, it will start dumping fuel on your exhaust
#1958 of 1972 Astrovan Blower fan relay, location, replace?
Dec 26, 2011 (5:18 pm)
Been messing with the 91 Astro for too long on blower fan not working problems. Replaced the resistor in the box, replaced the speed selector switch, got it working again, but still sometimes quits, and get nothing. I did hear a click of what I think is the relay, square cube?, next too the larger rectangular box, above the fan on the firewall. Well, now its back to zip. I can get it fired up by taking the hot wire off the fan, put it on high speed, and on defrost, motor running, plug in and works. But if select any other speed, or off defrost, goes dead. I want to replace the relay, but I'm LOST, on how it comes off? Can't see any tabs to move, seems hooked a rear, so any help on this a "big thanks". Sorry the long post but as a wrench a long time (but lousy at electrics), the more info the better. Thanks in advance guys. Robby
#1959 of 1972 Re: Astrovan Blower fan relay, location, replace? [cbharobby]
Dec 27, 2011 (2:28 pm)
OK, I got it off....DAMN, thats one STRONG CLIP!