Ok i have a 1999 GMC sufari van, it will turn over but wont start. i have checked the fuel pump, electronic ignition module, and the pump relay switch... what eles would you recommend checking or looking at?
Ah man, I too have a 1999 GMC Safari with the same problem. If no one has answered you yet, it is a problem with your PASSLOCK security system. This is supposed to prevent people from hot wiring your car. This is a common problem with gm, and there are some fixes out there. One is installing a bypass module. However, it didn't work for me : ( Does your van eventually start? or is it permanently stuck. A temporary fix is doing a reset procedure, this is the only thing that works for me. When you go to start your van, turn ignition to "start" but dont crank. Look for your security light on the bottom right side of the dash. If the security light is solid or blinking without going out after 2-3 seconds, then you know its your PassLock.Ah man, I too have a 1999 GMC Safari with the same problem. If no one has answered you yet, it is a problem with your PASSLOCK security system. This is supposed to prevent people from hot wiring your car. This is a common problem with gm, and there are some fixes out there. One is installing a bypass module. However, it didn't work for me : ( Does your van eventually start? or is it permanently stuck. A temporary fix is doing a reset procedure, this is the only thing that works for me. When you go to start your van, turn ignition to "start" but dont crank. Look for your security light on the bottom right side of the dash. If the security light is solid or blinking without going out after 2-3 seconds, then you know its your PassLock.
Now turn it off for 30 seconds, and back to start position and leave it. (do not try to start your van) Now is the waiting game. On mine, the light will turn off around 30 min. I have heard people saying its 15 min, but mine is usually 30 min. On rare occasions, it takes 1 to 1.5 hours to reset but it always resets eventually. Once you see the light off, it will turn over and run. The important thing to remember is to make sure your radio and all lights are turned off during this process because it can kill your battery especially if you have been cranking it a lot with out it getting the chance to recharge while running. Hope this works, and let me know if it does. I spent over 1000.00 on repairs on airflow censer, and fuel pump when this was the problem the whole time. Let me know if you have any questions. too.Now turn it off for 30 seconds, and back to start position and leave it. (do not try to start your van) Now is the waiting game. On mine, the light will turn off around 30 min. I have heard people saying its 15 min, but mine is usually 30 min. On rare occasions, it takes 1 to 1.5 hours to reset but it always resets eventually. Once you see the light off, it will turn over and run. The important thing to remember is to make sure your radio and all lights are turned off during this process because it can kill your battery especially if you have been cranking it a lot with out it getting the chance to recharge while running. Hope this works, and let me know if it does. I spent over 1000.00 on repairs on airflow censer, and fuel pump when this was the problem the whole time. Let me know if you have any questions. too.
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Re: Ok i have a 1999 GMC sufari van, it will turn over...
Have you checked crankshaft position sensor? located on side of the harmonic balancer (crankshaft pulley), unclip wiring harness on sensor and use 8mm socket to remove bolt holding it in place.
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install a fuel pump guage and check pressure at key on and start, it should hardly vary, it the pressure is constant check the injector signal with a noid light, while you are at it check spark(no spark no injector signal) you won't find a relay fuse
If your not getting the MIL- engine light coming on and you can smell gas and you had the fuel pump replaced. I would sespect the electronic ignition module of being intermintent. It wouldn,t necessarily show as an engine code and would make it so the vehicle would run find one munite and not run the next The other thing you could check is the fuel filter however i can,t see a mechineic not changeing this with the fuel pump
scan it make sure pcm is getting power or not faulty.if all is good. check fuse + relay.if both good fuel pump is faulty.also check fuel pump wires make sure they are not damage or broken.
look under the hood on the right side where your brake fluid is..There is a black box to the farest right of the brake fluid. take off the lid to this box were you will find fuses..Reach in and feel the fuses to see if any are loose.The largest fuses in the front, push down on those and then try to start it up..Take them out look at them make sure there ok if this dont work..they the one bad might need to be replaced..
could be a bad fuel pump, or fuel pump relay. they are having problems(a lot) with the ethanol in the gas on GM products.Fuel pumps sales are through the roof at parts house on GM's. Have a pressure check on your fuel system. That is probably it. Add a can of Seafoam to your fuel every 3000 miles to alleviate this problem.
if car wont start.make sure your battery volts are 12.5.if not charge battery.or replace it if dont hold a charge.if battery is good engine wont turn over.make sure battery cables is clean and tight if all good no start .have starter and starter solenoid check.if battery and starter is good.check for fuel .has some one turn ignition to the on position.go to rear of car listen for fuel pump noise.if your hear fuel pump check ignition system for spark.go to auto parts place buy a spark tester.if you get no spark .check .ignition fuses and ignition module.if you hear no fuel pump.replace relay or fuse.if if fuse and relay good replace fuel pump.if every thing good .your car could have crank sensor problem. or your car is in theft deterrant mode.if so have your car towed in and scanned.
firstly where is fuel pump relay as i have never seen a GMC jimmy sorry about that but have you ever seen a foden ?? well the first thing is to check the fuse,if fuse is ok which can be checked by looking at it as its transparent or a piece of wire with a light bulb .across the battery.to find the relay is easy if you dont know where it is,When this piece of americana decides to work just turn ignition on and listen for the click of relay ,then when it doesnt start listen for click again or rather an absence of a click,sounds more like a dodgy pump in the tank or the connections going to it.when it wont start try thumping the fuel tank with the ignition on and if it is a sticky pump you might hear it start then at least you will know where the fault is.Another fault that i have come across with relays is that where the relay is passing a heavy load then its possibe for the contacts to burn inside the relay.When this happens then if it is possible to seperate the relay cover and clean the contacts with a points file (remember them ) or a piece of fine emery paper if the cover breaks taking it apart then use a bit of black insulating tape to repair the cover.Thats assuming the pump is in the tank and not bolted to the chassis near the fuel tank but that design with external pump i havent seen on a europeon car for nearly 20yrs .
Ah man, I too have a 1999 GMC Safari with the same problem. If no one has answered you yet, it is a problem with your PASSLOCK security system. This is supposed to prevent people from hot wiring your car. This is a common problem with gm, and there are some fixes out there. One is installing a bypass module. However, it didn't work for me : ( Does your van eventually start? or is it permanently stuck. A temporary fix is doing a reset procedure, this is the only thing that works for me. When you go to start your van, turn ignition to "start" but dont crank. Look for your security light on the bottom right side of the dash. If the security light is solid or blinking without going out after 2-3 seconds, then you know its your PassLock.
Now turn it off for 30 seconds, and back to start position and leave it. (do not try to start your van) Now is the waiting game. On mine, the light will turn off around 30 min. I have heard people saying its 15 min, but mine is usually 30 min. On rare occasions, it takes 1 to 1.5 hours to reset but it always resets eventually. Once you see the light off, it will turn over and run. The important thing to remember is to make sure your radio and all lights are turned off during this process because it can kill your battery especially if you have been cranking it a lot with out it getting the chance to recharge while running. Hope this works, and let me know if it does. I spent over 1000.00 on repairs on airflow censer, and fuel pump when this was the problem the whole time. Let me know if you have any questions. too.
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