Author Topic: lossing power (Read 2445 times)

jump · « **on:** Dec 13, 2010, 08:39:10 AM »

Hello, I am new here and to toyotas. I have been reading alot of articles and searching for answers to my question, not much luck. I have a 85 pickup with the 22r, ported head, mild cam, weber 38, no egr stuff. I just installed the carb due to the previous one (weber 34) not working right and leaking. The engine was rebuilt about 5 months ago. The problem that I am having is the I have alot of low end power, the minute I hit a slight hill I loss speed fast. I have the timing set just shy of 5 with the vacuum lines plugged. I am wondering if my timing advance could be the problem, and if the is a simple way to check that.
Any thoughts on the matter would help, and the engine is not making any noise, other than it running.
Thanks Josh

79coyotefrg · « **Reply #1 on:** Dec 13, 2010, 09:49:39 AM »

Josh, it sounds like your cam timing is one tooth off.
remove the valve cover, set your crank pulley to ZERO on the timing mark. then look at your cam gear. where is the timing mark?

79coyotefrg · « **Reply #2 on:** Dec 13, 2010, 09:59:12 AM »

Quote

I have the timing set just shy of 5 with the vacuum lines plugged

that is the procedure for a fuel injected 22RE NOT your 22R.

first we must make sure the cam timing is set right.

if when you get the timing mark on the crank pulley to 0* and you see the cam gear timing mark is either straight up 12 o-clock or if its a couple teeth to the passenger side then your a tooth off.
if you have a old clock with a minute hand and hour hand you want the dimple on the cam gear to be about 11:57 or have the minute hand around 57 minutes on the hour. this would be about 1 tooth to the pass side of straight up 12.

you'll need to remove the distributor from the head and put it out of the way, then get the cam gear bolt loose, remove the distributor drive gear, then pull the cam gear off the cam. move the chain ONE TOOTH (assuming its off) then reinstall

Sparkplug · « **Reply #3 on:** Dec 13, 2010, 11:02:20 AM »

How does it rev? Does it rev slow? usually when off a tooth, it will run ok, make ok power, not best, but it will pick up real damn slow. And like 70coyote said, check, and if its off, its not tioo hard to slip it off, and rotate it a tooth.

Hottrod81 · « **Reply #4 on:** Dec 13, 2010, 04:46:27 PM »

More info, Size of tires, gear ratio, etc. It is a 22R and slight hills will cause it to lose speed. Also, how many miles are on the engine? If built correctly, it can take up to 3,000 miles to fully loosen up and break in.

yoshaleng · « **Reply #5 on:** Dec 13, 2010, 09:43:40 PM »

What tire size and gears are you running?
If it drives great on straight rd but loses power on hill climb, you may not have the right gear ratio to run that tire size..

Rocksurfer · « **Reply #6 on:** Dec 14, 2010, 03:17:06 AM »

Sounds like a 22r to me, but yeah need more specs on the truck. Even 31's on a stock 22r can drag it down quickly. If you have large tires and stock gears that will be an issue.

yoshaleng · « **Reply #7 on:** Dec 14, 2010, 02:30:17 PM »

x2

jump · « **Reply #8 on:** Dec 16, 2010, 08:29:27 AM »

Its got the stock gears 4.10 if I was told correctly. The tires are 30 inch all terrains. When I get a chance I will check the cam timing. If I have the timing to advanced shouldnt I get a ping?

79coyotefrg · « **Reply #9 on:** Dec 16, 2010, 08:59:10 AM »

Quote from: jump on Dec 16, 2010, 08:29:27 AM

Its got the stock gears 4.10 if I was told correctly. The tires are 30 inch all terrains. When I get a chance I will check the cam timing. If I have the timing to advanced shouldnt I get a ping?

no, dont confuse cam timing with ignition timing.

are you getting a ping when under load??

jump · « **Reply #10 on:** Dec 16, 2010, 02:14:54 PM »

no i dont

79coyotefrg · « **Reply #11 on:** Dec 16, 2010, 11:02:45 PM »

ok, yea I'm still leaning towards cam timing off 1 tooth

jump · « **Reply #12 on:** Jan 06, 2011, 08:35:35 PM »

I finally got a chance to check the cam timing, and it was off. If I read the directions right, it was straight up and not at 57 passed the hour. Will take it out and see what happens.

jump · « **Reply #13 on:** Jan 07, 2011, 09:41:04 AM »

Well I took it out and drove it and I am still losing power up hills, what should I set my ignition timing to? I dont have any of the emission stuff on it.

HogCanyonHopper · « **Reply #14 on:** Jan 08, 2011, 11:21:19 AM »

I've been having the same problem w/my truck. Starts fine, seems to run good till I get on the throttle. Just doesn't have any power. I decided to pull the cam gear and move it a tooth. Now I can't get it to run at all. I put the dimple at straight up 12 o'clock thinking I was a tooth off. After putting it back together I played heck trying to get the ignition timing right. It is too advanced I think. So now, I am pulling the cam gear back off and putting it back where it was.
79coyote said to put that dimple at approx 11:57 or one tooth to the passenger side. I am pretty sure that is where I had it.

Thanks to 79coyote, and all others, for being helpful.

Heres a pic before I move it. One tooth off?

And now over one tooth. 57 past the hour.

jump · « **Reply #15 on:** Jan 08, 2011, 04:05:15 PM »

When I pulled it off the first time it was straight up, like the top picture
Changed it, and now it looks like the bottom picture
I set the timing and lost power. I have read that some guys have it advanced quit a bit.
I am kinda lost

, the one thing that I am thinking is that the po had the head milled and put a mild cam, so I might need an adjustable cam gear to get it dialed in.
I think I am going to advance the timing until it pings then back it off until it stops.
I hope that it works

HogCanyonHopper · « **Reply #16 on:** Jan 08, 2011, 07:43:11 PM »

After putting the cam gear back at 11:57, I put the distributor in and proceeded to set timing and now, for some reason, I have no spark

Pulled the wire off the coil, cranked it, nothing. Pulled a plug and cranked it, nothing. I am wondering if my coil is bad. New alternator, new distributor, new DieHard battery, motor is totally rebuilt, carb has gone through...WTF.....

Good luck jump

79coyotefrg · « **Reply #17 on:** Jan 08, 2011, 08:16:56 PM »

not sure what you did with your ignition timing but the cam is SPOT ON

assuming you have your crank set at 0*

79coyotefrg · « **Reply #18 on:** Jan 08, 2011, 08:25:55 PM »

Quote from: jump on Jan 08, 2011, 04:05:15 PM

When I pulled it off the first time it was straight up, like the top picture
Changed it, and now it looks like the bottom picture
I set the timing and lost power. I have read that some guys have it advanced quit a bit.
I am kinda lost , the one thing that I am thinking is that the po had the head milled and put a mild cam, so I might need an adjustable cam gear to get it dialed in.
I think I am going to advance the timing until it pings then back it off until it stops.
I hope that it works

you guys are taking the distributor out each time right??

jump · « **Reply #19 on:** Jan 08, 2011, 08:35:29 PM »

Yeah, the po had it 180 degrees off, but just switched the plug wires to fix it. I set it up the right way. I am not sure about the timing on mine though. What do you have yours timed to at idle?

HogCanyonHopper · « **Reply #20 on:** Jan 08, 2011, 08:43:23 PM »

8-10* at 850 rpm

jump · « **Reply #21 on:** Jan 16, 2011, 01:24:20 PM »

Well I put the timing to about 12 degrees and it is doing good. Losses a little power, but I think thats just the 4 cylinder and my carb is probably not tuned the best. Thanks for the help

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