I just watch my local news and found out that a area gas station mistakenly surplied customers with diesel gas while purchasering regular unleaded unforturely i bought some gas from one of the station less than two minutes after pulling off the truck(97 tahoe 5.7) cut off and refused to restart i thought maybe the fuel pump went out, so i replace it. not knowing the gas might be bad i put it back in the truck it started but would not idell correctly,it ran good while driveing but needed the gas pedal press at stops to stay from cuting off. i thought maybe o2 sensors, so i replaceed the down stream one. started it same problem by now the bad gas is gone. so the next day i go to start the truck wiht different gas it wont start. i buy the two more o2 sensors up stream but the truck still wont start any suggestion
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same for all engines. (no engine stated, so no exact answers)
is your gas or diesel (ill guess gas)?
gasoline and not LPG or other fuels. real gas ,nor flex fuels on E100
cranks but no starts.
blown fuses, check fuses first, ( always #1 with EFI)
the first check is spark , gas dont burn lacking SPark (mr,otto cycle)
watch funny guy SCOTTY. https://www.youtube.com/watch?v=064Ilsz8Fzg&NR=1&feature=fvwp
any engine can run on test fuel, if it has spark (Otto)
some engines will never start
lost compreesion 1 or more cylinders
melted CAT converter, blocking exhaust
EgR stuck open, wide, if your unstated engine has one.
fuel pressure zero or 10psi. dead. must be at spec.
at a gas station? you cant put diesel in your gas car at a gas station the nozzle of the diesel pump is ALOT larger than that of a gas pump it will not fit into your filler neck. hope this helps. ,Vinny
safety[ limp] mode truck wont go over 2000 rmp but it will get u safely off road or to a service station or home ur getting some kind of code thats effecting ur truck --use a different reader urs might not be able to retrieve the problem code but can reset the computer-some auto stores such as auto zone / advanced auto scan for free check shops in ur local area
To start out with. You left out some very important information. Like: the miles on the engine, the miles on the spark plugs, electronic ignition or points, but, I will attempt to give you some pointers and areas to check.
First off, I don't believe the rusty gas tank with the hole in it has anything to do with your problem. Dieseling... I guess you have to understand the differences between a gas engine and a diesel. Basically is: a gas engine runs on spark and a diesel runs on glow plugs and compression, lots of compression. True dieseling usually is a result of having a carbon build up inside your cylinders, usually on the valves. The carbon glows when it gets hot and when the engine turns over opening the intake valves it lets in fuel.Even when you shut the engine off it still makes a few turns, causing the intake valves to open letting in fuel and if there is carbon present and it's hot you may get dieseling. You also may experience what appears to be dieseling from having your timing off. It could be from having a timing chain "jump" a link, (alot of miles on the engine) or it could be from the distributer being out of time. Both may cause loss of power and the "appearance" of dieseling. It sounds like to me that you may have a lot of miles on this vehicle and it may be loosing compression thus causing the loss of power climbing hills. Loss of compression could be caused from worn rings, bad head gasket. The block section of the engine. Or: cracked, worn, or brokrn valves, the heads of the engine. Which may explain the dieseling. Bad plugs and bad plug wires can also result in the loss of power you are experiencing while climbing hills, but you would more than likely experience the engine missing, which you did not say you were experiencing.
You may want to check with a local salvage yard for another engine if the rest of the vehicle is "worth" saving or plan on doing a compression test and more than likely...some "heavy" wrenching and rebuils you engine.
I hope this helps you. If it does please let me know and put in a post about it.
The fuel system has a bleeder located on the engine, located near the passenger side front of the engine. Open the bleeder, turn the engine over until you can see fuel come out on the ground near the front of the engine. Close the bleeder, attempt to restart the engine. It may take a couple of tries, but it should start after five or six attempts. Do not run the starter for more than twenty seconds per attempt, with at least one minute between attempts.
The crazy part about it my car doin the same thing.Part of problem was I had got some bad gas from a cheap gas station( so watch your gas) I replaced fuel filter and pump (by car shop) and put in jet cleaner also. When I took car out shop it was still doin the same thing. I have changed the throttle position sensor and it seemed like it half-way fixed the problem, but now all it do is stall or cut off when touch gas pedal.