Char92dj8

My 89 has been missing on one cylinder a random time... most of the time it hits on all 6, but then out of know where... it just starts missing and running like crap... im thinkin it could be the injectors? any ideas?

cherokee77

Could also be pickup coil under dist cap, or tps, or map sensor.

Mine was doing the same thing, And the blue wire on dist plug was broke, Fixed wire and ran awesome.

Colinjohns

Could be injectors...cheap check without the diagnostic bill is to unplug the electrical connectors for the injectors one at a time when it is running like crap this will at least show you which cylinder isnt firing. Maybe not the healthiest thing for the engine but just dont let it run long when unpluged. Then check your spark plugs and ignition stuff..like wires rotor and cap those sorts of things and make sure they are clean and in good working order.

Also...does it normaly start up fine when cold then randomly start running bad when warm..and maybe every once in a while start bad?

If so these are common injector symptoms.

Char92dj8

It runnns on all 6 like 95% of the time...but 5 % it sounds like a go cart lol and you can hear ir goin put put put if you know what i mean

Colinjohns

you can check all the sensors...tps..iac..map..mat/cts..and the egr valve and solenoid. Also check plugs and wires. check your fuel pressure at the rail should read 30psi..check when it is running bad if it is low check fuel filter, regulator and pump. Could still be injectors though.

Colinjohns

check this site out for info on checking sensors and alot more! Great for the renix used to have one http://www.lunghd.com/On_Site_Tech.htm