***Missfire***
11-30-2007, 10:36 PM
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***Missfire***
i have a 87 4runner with a fresh 22rte engine. I have been chasing this misfire that happens between 2500 and 3000 rpm for some time now.
The engine has less than 3000 miles on it, new fuel pump and filter, cleaned and flowed injectors, new tps, cap, rotor, plugs, wires. I have traced all the wires from afm and tps to ecu checked out ok. even tried another ecu and afm. the only thing left to try is o2 sensor. i have had a a/f meter hooked up to it and the ratios have been good until the missfire than it goes lean which was leading me to think it was a fuel problem. it is even happens in 5th gear on the freeway. very irratating,dang missfire.
any sugestions or helpful opinions are greatly appreciated.
The engine has less than 3000 miles on it, new fuel pump and filter, cleaned and flowed injectors, new tps, cap, rotor, plugs, wires. I have traced all the wires from afm and tps to ecu checked out ok. even tried another ecu and afm. the only thing left to try is o2 sensor. i have had a a/f meter hooked up to it and the ratios have been good until the missfire than it goes lean which was leading me to think it was a fuel problem. it is even happens in 5th gear on the freeway. very irratating,dang missfire.
any sugestions or helpful opinions are greatly appreciated.
12-02-2007, 05:24 AM
#2
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i have a 87 4runner with a fresh 22rte engine. I have been chasing this misfire that happens between 2500 and 3000 rpm for some time now.
The engine has less than 3000 miles on it, new fuel pump and filter, cleaned and flowed injectors, new tps, cap, rotor, plugs, wires. I have traced all the wires from afm and tps to ecu checked out ok. even tried another ecu and afm. the only thing left to try is o2 sensor. i have had a a/f meter hooked up to it and the ratios have been good until the missfire than it goes lean which was leading me to think it was a fuel problem. it is even happens in 5th gear on the freeway. very irratating,dang missfire.
any sugestions or helpful opinions are greatly appreciated.
The engine has less than 3000 miles on it, new fuel pump and filter, cleaned and flowed injectors, new tps, cap, rotor, plugs, wires. I have traced all the wires from afm and tps to ecu checked out ok. even tried another ecu and afm. the only thing left to try is o2 sensor. i have had a a/f meter hooked up to it and the ratios have been good until the missfire than it goes lean which was leading me to think it was a fuel problem. it is even happens in 5th gear on the freeway. very irratating,dang missfire.
any sugestions or helpful opinions are greatly appreciated.
12-02-2007, 11:51 AM
#5
Turbo is sucking coolant into the intake and causing misfire. There is an internal leak from the cooling line inside the turbo. What is the status of the CT20, is it old?
Is your overflow slowly going down? That is a sure sign.
Is your overflow slowly going down? That is a sure sign.
