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The computer went out again. Pip signal into the computer was nice square wave but the spark out was pure shredded noise.

Maybe jumping off the old beast is killing the computer. I only run it a few months out of the year. Of course, putting out for a new computer is out of the question, there is one company that does but its very expensive. Its times like this I like Dodge and Chevy as they kept recycling their...

Welp Yep Nope Borrowed an oscilliscope, PIP signal going to computer is a nice even pulse wave, Spark output coming from computer is pure shredded wheat. I guess it killed another one.

The Ranger will run pretty well with the Spout connector undone, but misfires grossly when the spout signal is present. I ran new wires for the pip signal and spout signal from the TFI to the computer. In doing this I am able to backprobe it while its running. I would think that if it runs well...

I can try that tomorrow. I wasn't thinking it was valvetrain as the tach quickly jumps around when it screws up, which made me think the spark was dropping out as the tach is run directly off the coil. EDIT my apologies, the tach is run off of the TFI, the tach and coil trigger share the same...

Fuel pressure is where it should be according to the gauge I have, just in case I made sure to replace the fuel delivery system and the numbers really didn't change. It will misfire under no load as well. Its harder to tell but definitely does it. I can entertain the idea that this maybe a...

I fixed all the Vac leaks, but it ran fine with a bunch of vacuum leaks last year. Cant test compression but I think its probably fine, not usually something that suddenly changes I would think. Truck ran strong last year, no oil burning or blow by, and got 21mpg on the highway on a long trip...

I posed this on a different ranger forum, fixed some other issues based on the replies(Thx, RonD) but not the main issue, so perhaps I can get some fresh eyes on the problem It is a misfire or intermittent lack of fire around 3000 rpm. The tach drops when it happens. I have replaced Coil, Fuel...

I have a Ranger and it is a basket case but maybe I can learn and help others while I am here. I seem to have a penchant for buying cars that always have a single problem that can't be solved by anybody but maybe my luck'll turn around this year.