Question about 1986 Dodge Ram 50

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1986 ram 50 canadian 4 cylinder, turns over strong, wont start

Theres a tiny hole in the rusty gastank that leaks all the gas out if the tank if it is over 3/4 full. the truck has been dieseling once warm. the truck has little power when going up hills but if you rev it it goes. just changed the fuel filter it was a "fun" job to say the least even with the 4 post :) New oil, filter, airfilter, PCV . the truck is so rusted out. my ex girlfriend has been driving it for 2 months during our short winter in Kelowna BC. Just wont run. I will first check that theres spark to all 4 plugs and patch the gas tank hole. Would that hole in my tank be my problems...... thankxx

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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.
Thanks!





Posted on Feb 25, 2009

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