22re misfire 1 and 3
#1
Registered User
Thread Starter
Join Date: Jan 2012
Location: Albany, NY
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
22re misfire 1 and 3
So, I have a 91 4x2 DLX Extended Cab 22re and I have a misfire on cylinders 1 and 3. I bought the truck originally with a misfire in cylinder 3. I threw a new injector in and it cleared it up for about 30 miles, then again misfire on that cylinder. Got another injector, threw it in, fixed it again, this time for only about ten miles.
Things I have done:
- Compression test, all 4 cylinders test around 180
- plugs, wires, cap, rotor
- igniter
- two new fuel injectors
- tested injectors and they have pulse
- "new" junkyard computer (computer was out of virtually the same truck, compared year, model, emissions, drivetrain and tranny)
- removed the cat (thought it might be clogged up and creating too much back pressure)
- checked all the grounds, they are all good
- no CEL or stored codes
I'm at my wits end with this. Any insight would be helpful.
Things I have done:
- Compression test, all 4 cylinders test around 180
- plugs, wires, cap, rotor
- igniter
- two new fuel injectors
- tested injectors and they have pulse
- "new" junkyard computer (computer was out of virtually the same truck, compared year, model, emissions, drivetrain and tranny)
- removed the cat (thought it might be clogged up and creating too much back pressure)
- checked all the grounds, they are all good
- no CEL or stored codes
I'm at my wits end with this. Any insight would be helpful.
Last edited by flummery; 01-12-2012 at 08:02 AM.
#2
Super Moderator
Staff
iTrader: (1)
Join Date: Aug 2008
Location: Anderson Missouri
Posts: 11,788
Likes: 0
Received 21 Likes
on
19 Posts
I have had a similar situation on my Number 1 cylinder. Mine turned out to be a bad connection on the fuel injector itself. Try wiggling the connector while it is idling and see if it cuts out.
If you have the wire clip that holds the connector on, they can be brittle and not make the best of connections. They later improved the connectors that have a little press tab. Not sure which year they changed. The little press tabs are the better one.
If you have the wire clip that holds the connector on, they can be brittle and not make the best of connections. They later improved the connectors that have a little press tab. Not sure which year they changed. The little press tabs are the better one.
#4
Registered User
Might want to check the splices in the wiring itself.
http://forum.ih8mud.com/79-95-toyota...lem-i-had.html
From 4crawler's site:
http://forum.ih8mud.com/79-95-toyota...lem-i-had.html
From 4crawler's site:
Last edited by Cmayer; 01-12-2012 at 08:58 AM.
#5
Registered User
Thread Starter
Join Date: Jan 2012
Location: Albany, NY
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
I'm gonna have my mechanic take a look at the splices. It's too cold and wet outside for me to be messing around with electrical outside. Plus he owes me a couple favors.
#7
Registered User
After July or August of 88 there is no solenoid resistor in the circuit. Toyota switched to high impedence injectors 13.8 ohms and the solenoid resistor was no longer required. Your wiring harness should be direct from the ECU to the injectors. 22-RE's are still batch fired so No. 10 or No. 20 will both complete the ground circuit and fire the injectors, so if #1 annd #3 are consistently not firing then I would be checking the power wire splice that ties the two together. In the diagram it is the yellow wire, but your 91 probably is a different color.
Trending Topics
#8
Registered User
Thread Starter
Join Date: Jan 2012
Location: Albany, NY
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
It seems like i fixed my problem. I had injectors 1 and replaced...again. The harness is pristine. I got to the point of frustration where i started swinging a hammer at random parts of the intake manifold. I hit the cold start injector and the idle smoothed right up and the misfires seemingly stopped. I'm about to go take it for a test drive. But i have to say, things are looking good.
My best guess is that the CSI was stuck open with some crud or something and the knock with the hammer knocked it loose.
My best guess is that the CSI was stuck open with some crud or something and the knock with the hammer knocked it loose.
Last edited by flummery; 01-26-2012 at 10:29 AM.
#11
Registered User
Thread Starter
Join Date: Jan 2012
Location: Albany, NY
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
So, swapped the CSI and it runs infinitely better when it's cold now. One it heats up I get the same old problems again. Out of shear nowhere I decided to tap on my fuel rail with a 6in extension and doing that clears the miss and the rough idle issues right up for about five minutes at idle. Now I'm back to being stumped.
Thread
Thread Starter
Forum
Replies
Last Post
nframe
3.4 Swaps
3
08-16-2015 09:03 AM
pyramid
86-95 Trucks & 4Runners
10
07-30-2015 10:05 AM