hello all i need help

kzink

New member
well im new to the forum and i have a 1994 4runner 5speed 3.0 little backgroud on the problem. one day at the lake trying to cross this spot i always cross i guess it got a lot deeper and i was all the way up to my engine so it shut off and i pulled it out pulled the plugs and let it dry 3 hours later put it back together and drove home after about 10 miles of running rough it slowly went back to normal. a week later and running normal i took it camping where there was a ton of dust when driving at the end of the trip i started my truck and it would just die finally started it gave it gas and drove it home noticied it had a loss of power stumbles and hesitates and runs very rich with black smoke out of the pipe. replaced plugs wires 02 cat with no change codes are 24 31 so thought maybe vfam so i put my buddies vfam on and it would start idle around 1200 but sounded normal no more black smoke then would drop down real low and struggle to stay running then die giving it gas didnt really do much of anything. anyone have a guess on what it could be i still think my vfam is bad but i think something else has to be bad as well
 
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I`ve been chasing the same problem for years on my `88 V6. Changed all the secondary ignition and a MAF sensor. If I hold it at wide open throttle it will clean out. It is so intermittent it makes it hard to diagnose. The way it runs it sounds like a bad coolant temp sensor. I haven`t changed that yet. If you come up with a solution, post it.
 
any power and water will cause problems you will be chasing gremlins for years, you may need to replace all the sensors TPS, Knock, maf, idle air, cold start injector. the only way to narrow it down is to get a FSM and test each unit to make sure its putting the right signals out. dont forget the ignitor you may need to replace or rebuild the dizzy
 
Thinking now that this is just caused by lack of coolant I have a horrible coolant leak that was pretty minor but started really flowing out while camping and im pretty sure the cts sends info to the ecu so I'm replacing the Waterpump since that's whats leaking and I will give u the update after but still think my vafm is bad
 
Seafoam it.

images
 
What would the be the purpose to seafoam it I have never used it and don't really know what it does
 

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