Pulling my hair out with frustration

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M

Motomeister

10 Year 15 Year
Joined
Jan 21, 2009
Threads
1
Messages
5
Good evening all,

I am new to these forums and would like to introduce myself as well as seek advice on a problem im currently having with my new to me Toyota pickup. At 20 years old i don't need this kinda stress to turn my hair grayer than it already is. I just recently acquired a 1985 Toyota pickup SR5 with a 22re and a 5 speed. The truck is in absolute amazing shape with the interior pretty much perfect and body and drive train untouched.

Picked the truck up and it ran great and got me home from the sellers house no problem, but when i went to get the smog check here in California it did not pass for one stupid reason. Timing was not set correctly and therefore making it fail. Figured that was no big deal so i went home adjusted the timing to 5 degrees and took it back to the guy but the car had lacked some power. On the dyno with the smog machine it would not spin up past 15mph. Frustrated i took the truck to my mechanic to later find out that the truck's cam timing marks were off by two teeth which was a relief because i thought i found my problem.

I got a call back the next day and he had said that the timing is set correctly and that the timing advances once you undo the diagnostic jumper, but as soon as you go to accelerate the timing retards and has absolutely no power.

He is convinced that the problem has got to be the ECM, but its a hard thing to test and i dont justify buying one just to see if it is correct.

I got a few questions:
What other systems in this basic 22re system would cause the electronics to retard the timing?

I was originally thinking the TPS but i wouldnt think the TPS would retard the timing. Should i look at the tps a little more or is my thinking correct?

What ecm's are compatible with a 85 22re?
What if my engine block is newer than an 85 would that make it run different if it has a 85 ecm on it?

Thanks in advance i appreciate all the responses i can get,
I have used the search function with not luck.
Here are some pictures of my new friend. :)
Jake

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I would have to take a look at the 22re again but I was pretty sure that the timing on that truck was not related to the ECM...I could be wrong...I have had quite a few of them but it's been at least five or six years.
I'm courious about the timing marks...why was it they thought the marks were off?
Did you always have this problem of a loss of power?
I can tell you after doing half a dozen head gaskets on that engine and finishing up what some one else started...It was not un common to get one with the cam off a tooth or two...If the guy didn't know what they were doing...

Where is the timing mark at when you go get the emissions done?
 
Timing was set at ~23 degrees advanced when i brought it home. Emissions optimally wants it at 23 degrees.

When i first brought it home it was at 2 degrees off on the timing but is corrected now but having some problems. So when i retarded the timing by 20 and had it at the right emission timing it had no power but apparently at the time were some other complications making it run the way it is.

With the cams all sorted out it does not have power off idle seeing how the timing gets retarded as soon as you accelerate.
 
I will start by saying I'm pretty lame on electronics but my daughters 4 Runner was running all kinds of goofy, I couldn't find the problem until the alternator crooked. Replaced the alternator and no more troubles. I think the over/under voltage to the ECM was screwing it all up.
 
I believe the amount of timing is controlled by the ECU. You set the base timing with the jumper in the diagnostic terminal at 5* and when you remove the jumper it should jump to around 13* and the idle will also rise.

I've used ECU's from 85 through at least 87 or 88. I don't remember. Boneyard ECUs are not too expensive. At my local pick-n-pull they run around $30. Note that there are two ECUs part numbers for the 1985 model year (early and late), but they interchange.
 
I think that is my mission tomorrow, find a ecm for it and a TPS and hopefully one of the two will fix this stupid little problem. Tried a distributor already and that didn't do s***.

Wish i knew someone in the area that could loan a ecm to me for like an hour. That would be conveient.
 
2ndGenToyotaFan said:
Have you check it for trouble codes? It may just tell you what the problem is....

Also, nice truck!!!!!!

Also, no one likes you!!!!! (cause of the truck...)

Also, welcome to Mud!!!!! :flipoff2:
Click to expand...


Not throwing any codes so its kinda a hard one to troubleshoot.

Even though i have been messing around with this issue for awhile it will still be worth my time and money because of the condition of this bad boy.

Cant wait to haul my dirt bike up to the mountains with it. Unfortuanely i gotta put some miles on it before i start modifying it too much because it will be my daily driver and still need bed height to be reasonable to load a few dirt bikes in it.
 
Got a new ecm put in and the truck is now advancing the timing properly. After base timing is set and you accelerate it wont return the timing back to base,

Does this mean my tps needs adjustment?
 
Could be:


Computer. (to check interchangeability. see sticker for "22R-E". And there will be a 3 numbers that correspond with the pin#'s. Something like, 16-14-16. Get the pin #'s off your truck, and any computer with 22RE and those # of pins will (should) work)

TPS not properly adjusted.

Bad TPS

Head milled too much.

I always suspect a 84 chain on an 85 motor when I hear about timing problems on 85 trucks. Or, 84 and > blocks with 85 and up heads...


...I'm still thinking....:hhmm:
 
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