noob with some questions

1

1990runner

New member
Hello Everyone,

I'm new on here and it looks like you have a pretty good, active forum. Well, to get right down to business I have a few questions.

I recently bought a 1990 4Runner SR5 with the 3VZE. The first thing I had to do was a cylinder head gasket job and timing belt. Well, that was fun but I still have problems. It starts and runs fine, but as soon as you try to go anywhere, it is COMPLETELY powerless. It seems like a timing issue since it does not respond to throttle and only bogs out.

The cams are timed properly to the crank I'm sure, but I am going to pull the timing cover again just to be absolutely sure. Tomorrow I'm hooking up my timing light to check the base ignition timing, but I don't know what it's supposed to be. The Haynes manual says to check the VECI (emissions label under the hood) but it's not there under my hood! What's it supposed to be set at? I have heard 10 degrees BTDC. Thanks in advance for any help!

Paul
 
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How many miles is on that motor? Also is the check engine light on? If so what are the diagnostic codes.

Mike
 
TSP-MIKE said:
How many miles is on that motor? Also is the check engine light on? If so what are the diagnostic codes.

Mike
Click to expand...

The engine has 200,000 km (125,000 miles). I meant to say in my original post that yes, I am getting trouble codes. I'm getting 52 for the knock sensor. I tried using a '95 ECU in it and then I got 52, 41 TPS, and 27 Oxygen Sensor. I only had 52 with the original ECU. It says in the Haynes manual that 27 only applies to California models so what's up with that?

I am thinking that there is a timing problem that is causing the ECU to put out these codes, but I am open to suggestions. Has anyone experienced this problem before? This is the first Toyota I have ever owned.
 
Code 52 is telling you that there is an open circuit in the knock sensor signal. I'm thinking that you might not have plugged it back in when you did the headgaskets.

Code 41 is the TPS, If the TPS is bad this will cause exactly what you are describing. There is either a short or a bad sensor.

Code 27 is only California emissions. They have a different emission system than everyone else because there is so much pollution over there.

So I don't think there is anything wrong with the timing, but the TPS is most likely causing your problem.

Mike
 
The knock sensor is plugged in. Also, I have tried another TPS and it made no difference whatsoever. I really had hoped that was the problem. I was aware that 27 is California emissions, so why am I getting it?

I'm going to put the original ECU back in and see what codes are displayed. Do you know what the base timing is supposed to be set at?
 
I should also add that it runs and behaves exactly the same with the TPS unplugged or the Knock Sensor unplugged.....
 


The cams are timed properly to the crank I'm sure, but I am going to pull the timing cover again just to be absolutely sure. Tomorrow I'm hooking up my timing light to check the base ignition timing, but I don't know what it's supposed to be. The Haynes manual says to check the VECI (emissions label under the hood) but it's not there under my hood! What's it supposed to be set at? I have heard 10 degrees BTDC. Thanks in advance for any help!

Paul [/B]
Click to expand...


Yes you are correct 10degrees BTDC with data link connector short-circuited at idling.
 
Okay, thanks. I checked out the timing with the light and it was at 10 degrees past TDC. So it was retarded 20 deg! The distributor was off a tooth on the cam. Well I set her up at 10 BTDC and things are much better :D

The check engine light stayed off and for 2 days there were no codes. Then code 52 for the knock sensor comes back and it's still there now. Power did not change and it still runs nice but that damn check engine light is on.

Throttle response was a little weird, so I adjusted the TPS according to the Haynes manual (since I had swapped the TPS a little while ago without adjusting it to spec). After doing this throttle response is perfect but the idle is a little high @ 1500 rpm until it's fully warm. Then it's @ 12-1300. So I may need to adjust the idle speed? Also after adjusting the TPS I'm getting code 51 along with 52.

Are these things even meant to operate without getting engine codes?!
 
Vermonster made 3 posts yesterday with ................

Are you just trying to be annoying or are you making a point?
 
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