Well, i assume you did a compression check and have the plugs gapped properly? Okay then, this might not be what you want to hear but, disconnect the fuel lines, install a low pressure electric fuel pump(between 3 and 10 psi one) and install a variable pressure regulator, set it at 4psi and drive the truck. still need more power move to 5psi, adjust untill your happy.
the previous owner did say he installed a new fuel pump (mechanical crankshaft type) and also said that this has never done it before til after the new fuel pump was installed, make no sense to why he replaced it to begin with, when it wasn't doing this before. the solution you gave me seems alil steep, i did gap the plugs properly but i haven't done a compression test just yet.
thanks for the 1 thumbsup, pretty harsh for a guy who knows nothing about auto mechanics. mechanical fuel pump driven by crankshaft or camshaft, the lobe that the pump rides on can get worn away. since you dont have xray vision, i was giving you a solution that bypasses fuel delivery problems because of a worn lobe. so excuse me for answering your question.
this sounds like my problem too!! i have an 87 ram 150 w the slant 6... ive described it more as it feels like the engine is missing.... BUT i dont lose speed and here's what is the kicker...in park and neutral. it runs great.. the engine does. ill be going along in drive n it will be chugging n skipping/missing/etc.. ill drop it in neutral.... n it runs like a top!! as i park it, and hit the throttle in park...again it runs great!!! lastly, 2nd gear only does it about half as bad as drive does.. otherwise it starts fine, as well as idles!?!?! please help me!!!!!
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I have done everything that you have mentioned and come to find out the carburetor for 87-89 are worthless. Too many emission adjustments and engineering has caused them to be, basically, a piece of junk. Get a weber carburetor and get rid of the factory is what I would advise. Almost guarantee this IS your problem.
I have a similar problem with my 89 Ram 50, 2.6L. I had the cat checked, good. Replaced fuel filter and pump. Checked the float level. I have not done a compression test yet. I also have not changed the cap, rotor and wires yet.
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this sounds like my problem too!! i have an 87 ram 150 w the slant 6... ive described it more as it feels like the engine is missing.... BUT i dont lose speed and here's what is the kicker...in park and neutral. it runs great.. the engine does. ill be going along in drive n it will be chugging n skipping/missing/etc.. ill drop it in neutral.... n it runs like a top!! as i park it, and hit the throttle in park...again it runs great!!! lastly, 2nd gear only does it about half as bad as drive does.. otherwise it starts fine, as well as idles!?!?! please help me!!!!!
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