knock sensor blues

yotacrazy · Nov 21, 2011

i have a 89 toyota 4runner with a v6 (horrible engine) picked it up for 6 hundo, lady thought it had blown head gasket, ended up being 3 quarts to much oil, lots of vaccum leaks.... and a knock sensor. i installed a new one and the pig tail to the outside or intake. still throwing code and cant figure it out. any ideas, forums or past nightmares your-self?

WA-Wheeler · Nov 21, 2011

Besides it throwing the code...is it running rough? Not starting?

yotacrazy · Nov 21, 2011

ya it runs like ****, kinda rough like possible miss. put new plugs cap and rrotor. smokes black when i rev it up aggresivly

yotacrazy · Nov 21, 2011

it also has a decent valve tick on cylinder no 2 but i dont have the tool to compress the spring, i i have heard worse out of my 22re and it never botherded it

CHOP SHOP · Nov 22, 2011

maybe the "knock sensor" is sensing a knock?

Knock, knock?

Whos there?

3.0

3.0 who?

3.0 gonna blow!

skinny_pedal · Nov 22, 2011

CHOP SHOP said:
maybe the "knock sensor" is sensing a knock?

Knock, knock?

Whos there?

3.0

3.0 who?

3.0 gonna blow!

Roflmfao:haha:

Its still a Toyota. The anwry bastard will probably go another two years.

ain'tstuckjustresting · Nov 22, 2011

Valve noise is common in the 4cyls. In a 3.sloooooooow it's a sign of impending doom! :awesomework:

WA-Wheeler · Nov 22, 2011

Drive it till it dies! Let future Yotacrazy deal with it.

yotacrazy · Nov 22, 2011

ya a 3.0 w/ auto was not my first choice, but the price was right and it is a vehicle for my wife to drive w/ our 3 month old sun in the snowy roads. if it was for me it would get a solid axle and one or the two tbi 350's in my shop put in it, but its not for me so i gotta figure sensor out.

the 59 fiat · Nov 27, 2011

check the sheiled wire to sensor. make sure its grounded and a way from power wires(like rca on a stereo).

Thegreasemonkey · Nov 27, 2011

the 59 fiat said:
check the sheiled wire to sensor. make sure its grounded and a way from power wires(like rca on a stereo).

this, i rewired mine straight from the ecu to the pig tail at the intake. use coax wire, must be shielded. its the only shielded wire at the ecu.
also check your fuel filter.

yotacrazy · Nov 29, 2011

thanks, workin on it tommorow night. gonna fix the valve tick and see what happens. i can start it up and no code but as soon and i get 20 feet down the road the code comes on and it falls on its face.

XSrcing · Nov 29, 2011

Black smoke is unburnt fuel. I don't have much experience with Toys but sounds like the knock sensor is shorted out making it think it has a wild knock and is dumping fuel in to it to stop it.

Rix · Dec 2, 2011

More like it's pulling timing, probably.
besides wiring and sensor problems, piston rattle and sometimes rod knock will fool the ecu into thinking it has detonation and doing this same thing.

WA-Wheeler · Dec 2, 2011

When its running rough, unplug the knock sensor to see if there is change. Im curious to see if its even working.

yotacrazy · Dec 10, 2011

did some investigating into thevalve tick and found a toasted intake lobe on numer 2. pulled it apart and found some yahoo not only had the timing two teeth off on the left side but also forgot to install the shim on the number 2 intake. got new cam but now i cant find shims thick enough to get correct lash. need around 3.52mm shims, any ideas? toyota said they stop @ 3.1mm