88 ford ranger runs rough

[mxridercole]

Hey guys, I've recently gotten a 88 ford ranger and i think its running on four cylinders. I will take off the spark plug boots on two of the cylinders and it won't affect how the engine is running. Both cylinders and getting spark and have good compression. The truck will shake a bit when its under load and sound ruff. Sorry for my lack of knowledge I'm new to all this, Thanks!

[Psychopete]

which cylinders?

[mxridercole]

Originally Posted by Psychopete

which cylinders?

If you are looking forward at the truck its the top left and middle left cylinders. I'm thinking its some sort of timing issue because the cylinders are getting spark but maybe at the wrong time?

[Psychopete]

if you think it's timing, definitely go over the firing order. has everything been tuned up recently? what were your compression test readings?

[mxridercole]

Originally Posted by Psychopete

if you think it's timing, definitely go over the firing order. has everything been tuned up recently? what were your compression test readings?

I am 16 and this is my first truck, no it hasn't been taken in for a tune up recently, for compression all cylinders were 150 except for one that was 120, after I put oil in the cylinders to simulate new rings all cylinders jumped up 30 psi

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Like I said I'm new, how would I go over firing order?

[Psychopete]

[mxridercole]

Thanks so much! This truck was a mechanics truck at my school so some kid must of mixed up the spark leads, truck purrs now!