blaketippett

have a 1997 sr5 4x4 with the v6. got it on a trade cheap! when i got it a heater hose was busted and i fixed it. fired it up and its the roughed ride ever. i got it scanned and it said cyl3 misfire which is a non coil side. changed the spark plugs and the wires then scanned it and it said cyl 4 misfire and i put a coil on it and no change...it idles rough and after you get in 3rd or so gear running 55 it shutters bad, which i believe is the trans or the toque converter locking up...but now im worried about the bad idle and drive. any advice help is more than appreciated! thank you all!

Mojo_Risin

How many miles on it? 97's and 96's are know to have head gasket failures at the 150K+ range - and misfire on cylinder 3 and running rough (on cold start) is often the 1st signs ...my failed at about 195K.

yummybrains

Just went through the same thing/same symptoms with my '97 Limited 4R. Code said #6 cylinder misfire. Tried coil, plug, plug wire, even the Seafoam treatment (which actually helped for a short time), etc... turned out be the fuel injector.

*Edit* Mine didn't change from #6 cylinder to another.

4runnerFireman

Similar thing happened to me, it took me like 4 months to finally track it down. I tried swapping coils, fuel injectors, plugs, wires etc....turned out it was the upper plenum gasket leaking and sucking air in to cyl #5. Those gaskets are only like $12, worth a check.

Is the CEL coming on? Then turning itself off?!?!

Renaud33

I had a misfire on cylinder #3 and found it to be the coil pack. I had one of the auto stores pull the code. I tried new plugs first and then swapped the coils from cylinder #1 and #3. The code then said misfire on cylinder #1. That is how I determined it to be a bad coil pack. Replaced it and it has been fine ever since. Good luck.