Team420

recently swamped my truck, it was hydrolocked, had to pull plugs and turn over then spray ether into plug holes to get it going, once it started it ran ok other than stalling @ idle, get it home let it sit over night, then it wont start, unplugged power harness to fuel pump, after a few cranks she fires up, and continues to run(ran about a total of 10 min like this), shut it off, plugged fuel pump in, wouldnt start again..i figured(with help from a few people on yt) that it was prob the vafm, got a new one(new to me) threw it on, she started up great for about 5 sec(with fuel pump disconnected) then ran rough and rich again, stalling when i floor it.. it is still doing this and now giving me code 53(knock control prgram faulty- check ecm), i checked to see that the "cel" comes on when key is turned to on, and it does indicationg a normal system.
I have done tons of searching and not been able to come up with a solid reason for what causes the code 53... any one else encounter this before?
also any idea why it keeps running after the fuel pump is disconnected? it usually shuts down within a couple seconds after

Team420

SO..I am an IDIOT...in my frantic rush to get this truck up and running, i overlooked one of the basics... i looked at the oil to see if water got into my crank case, which it did not...however what i didnt look at was the level, nor did i check for gas... well after diconnecting the fuel pump and having the truck still run (over 20 min total) it finaly occurred to me that maybe theres gas in the oil, and thats why its still running....wouldnt ya know it...after all the cranking i did to get her goin the other day(without it starting) it dumped about an 1/8 tank into the crank!! wtf!!! drained it last night, and going out to put some fresh oil in now... i am sorry for wasting peoples time with that question, however im pretty sure ill still have code 53, and still havent found a solid reason for it!
Thanks, Jim

mt_goat

Wow, I never thought about the oil could be so full of gas that the engine would run off it.

I looked at my 93 pickup FSM for the 3VZE and a code 53 is a Knock control signal code. Maybe the gas in the oil was causing that, kind of a dieseling thing going on. Try pulling the battery cable for a while (at least 10 mins) to reset the ECU and see if it comes back AFTER you change the oil.

Here's the online FSM link to the codes:
http://personal.utulsa.edu/~nathan-b...85diagnosi.pdf

Here's the whole 93 truck FSM:
http://personal.utulsa.edu/~nathan-b...fsm/index.html

mt_goat

For you guys wondering, here's the rest of the story:
https://www.yotatech.com/forums/f116...rt-now-143875/

Team420

the code 53, is knock control program faulty, according to my fsm, 52 is knock sensor signal, batt was diconnected for over ten min, changed oil, it then ran long enough to flush the tranny(phew!!) but now its stalling out after about 2 min of running, and running really rough, getting serious missfire, and now code 14...not getting the code 53 any more though...im starting to wonder about this ecm...all tests foe ecm check out fine though...stumped?? any thoughts... maybe ignitor?

Team420

sorry not what the fsm says...it;s what my haynes says...that book is as usefull as tits on a bull, fsm says knock control signal

mt_goat

Oops...you're right, I edited my post to "knock control signal"

mt_goat

Now 14 huh...

Quote:

IGF signal from igniter is not input to ECM for 6
consecutive ignition.

Check that the surface between the igniter and fender is clean. I think the igniter is grounded by contact to the fender. On my 5VZFE I took a grinder and took the paint off in that spot of the fender to ensure a good ground. Maybe the 3ZVE is the same, I'm not sure.

Team420

so would that mean the ecm is bad? I have searched and searched but can not come up with a cause for code 53.. i know the code 14 is ignition circuit, so im gonna check my igniter and coil in a few...seemed to get worse as it warmed, and these 2 items were very close to the water, while in that hole over night

mt_goat

My FSM says see page EG-195

Here's the link to that page:
http://personal.utulsa.edu/~nathan-b...86troubles.pdf

mt_goat

Ok, back to code 53. The FSM just says the trouble area is:

Quote:

• ECM

Team420

yeah...very vague... so the fsm says to perform all test with the connectors connected... how the heck do ya do that?

so..checked out the coil, igniter, and it is getting good spark, not intermittent spark, so i would assume that means its ok...reset the ecm, and now getting code 53 only?? i should also mention, the ecm was under water, i took it out, opened her up and let it all dry for an hour or 2...didnt see and shorts on the board, but i guess that doesnt mean it works ok.. im really startin to lean toward the ecm now

Team420

once again...I was stupid and over looked an obvious thing... plug wire on #5 cyl was pulled off...dont remember why i did that...but i did... running much better now, but still code 53, and no overdrive...o.d. light is dimmly lit, gets much brighter when i turn o.d. off, and truck is buzzing @ me...like when you leave key in ignition and open door...does this while driving... i'm goin to attribute these things to the fact that everything is still wet, and trying to dry it out...hopefully ill have a good update later!!