Topic: 22r running rough

[4.3s10]

my friends 22r will drive fine but after an hour or so we will be driving and all the sudden the motor will start dying almost like it is mis-firing the truck jerks like crazy so we slow down and put it in first or second and it will be fine. We will get back up to speed and then in like 10 minutes it will happen again. So its weird that it would be ignition since it happens so randomly so maybye fuel i have no idea.

Any ideas would be helpful

[toymech]

 Whatyear is the motor,if its a 22re check that the windsheid isnt leaking water on the ecu. Ive had similar problem with my 88 pick up,wouldnt hurt either to double check fuel pressure and compression. Let me know how ya make out,my E-mail is Hatchadoin@aol.com   22re my specialty

[BigMike]

check that the windsheid isnt leaking water on the ecu

Is it raining there?


I would suspect your fuel filter, but this is a strange symptom indeed..

[toymech]

  No,its not raining here smartass,lol. When my truck acted up,it would do it whether it was raining or not,the computer was still damp enough to screw it up. I used to get it to run ok after taking the ecu out and dry it off with a hair dryer,it had the same driveability problem hes talking about,drove me nuts for a week or 2. hope this helps some   mike

[4.3s10 [OP]]

its an 85 i guess ill change the filter maybe rebuild the carb too

[79coyotefrg]

sounds like maybe a loose ignitor wire,  check and make sure your getting a good connection and ground on the coil and ignitor, and make sure theres no corrosion on the contact points,  also check the resistance of the coil,  how many miles on the 22r??  pull dist cap and look for a possible worn dist shaft bushing,   the jerking you are describing is caused from ignition trouble,  the cylinder is filling with fuel but not getting fire at the right time if at all,    otherwise you wouldnt have the jerk, well not as bad anyway

[4.3s10 [OP]]

yea that makes sense that it would be ignition it just doesn't make sense how it only happens sometimes and then goes away

[fellowsped]

that's teh beauty of electrical problems. they're very random and mysterious sometimes. if it's been a while since he did an ignition tuneup on it it would be worthwhile to do. a new dist. and plugs and wires and check the coil to make sure it's still good.

[Matty]

hey guys hes talking about my motor....its got 204,600 miles on it now, i just did dist., plugs, wires, rotor, i didnt check the coil yet so i will make sure to.....thanks for any help

[4.3s10 [OP]]

we still haven't fix the problem but we have found out more about the problem it will run fine for about 45 minutes then start to run bad we can let it sit for a half an hour drive it and it will be fine for a bit if it doesn't get a rest then it just happens every minute or so it is very annoying but what weird is we can drive around on the trail in lo range for ever and not have a problem once we get on the road to go home it starts acting up. The plugs wires and cap and rotor are new so now I'm thinking it might be fuel but it happens so randomly. Should i rebuild the carb or what and info is great

[brainlessfool]

ok, just for total laughs try next time it acts up insted of waitting for 10 or what ever mins. try spraying starting fliud on the base of the dist. (the metal not the cap)  this will cool the dist. do it untill the dist feels cool. get back in and see if you don't have to wait this time. if that helps then you more than likey need a new mod for the dist.

P.S. do not do this with the truck running and do stay away from the hot exhaust manifold

  don't want ya to go 

of corse you could use water too, from the ice chest.

[4.3s10 [OP]]

ok, just for total laughs try next time it acts up insted of waitting for 10 or what ever mins. try spraying starting fliud on the base of the dist. (the metal not the cap) this will cool the dist. do it untill the dist feels cool. get back in and see if you don't have to wait this time. if that helps then you more than likey need a new mod for the dist.

P.S. do not do this with the truck running and do stay away from the hot exhaust manifold

 don't want ya to go

of corse you could use water too, from the ice chest.

alright im gonna try that but what do you mean by starting fluid and a new mod for the dist

[79coyotefrg]

 i think brainy is talking about the mod-ule   

im still leaning toward a bad coil/ignitor

[79coyotefrg]

next time it does that jump out and feel the coil and ignitor box,  i'll bet ya $10  it will be REALLY hot,     ok i really dont have $10  but i still think thats your problem

[4.3s10 [OP]]

kinda a dumb question but do i have that module its not an efi truck

[jimbo74]

yes you have that module, its part of the ignition control unit... has a built in coil if its the 22r i am thinking of.... costs $300 for a new one!


personally i wouldnt spray anything cold on the hot block or lower part of the distributor, its aluminum, and hot aluminum with cold liquid causes cracking

[4.3s10 [OP]]

where is the module located

[brainlessfool]

Oops,    I meant to say "pick-up coil". sorry about that. that what I get for posting from work. 
and don't worry about cold water on worm dist. it will not crack. it that was a possability no one would ever go though watter on the trail.
now poring cold water into a over heated block, now there you mite.

[8622r]

my 86 did the same thing about a year ago with about the same mileage
almost every day on my way home from work the the truck would surge
1st i thought  i t was me or the a/c cycling than one day at a stop sign
...well it stopped and would  not restart ignitor was bad. toyota wanted
like 650.00 i did fing one for around 325.00

i also was able to keep it running  when it was surging by reving it up
untill it breathed its last breath at a stop sign by a church......

[4.3s10 [OP]]

Oops,    I meant to say "pick-up coil". sorry about that. that what I get for posting from work. 
and don't worry about cold water on worm dist. it will not crack. it that was a possability no one would ever go though watter on the trail.
now poring cold water into a over heated block, now there you mite.

whats a pick-up coil a what is its job.... its  obviously different than a coil since its so much money

[brainlessfool]

whats a pick-up coil a what is its job.... its  obviously different than a coil since its so much money

it's in the dist. it tells the "brian box" when to fire the spark plugs.

[4.3s10 [OP]]

it's in the dist. it tells the "brian box" when to fire the spark plugs.

yea i know what a dist is i just never heard it called a pick up coil... But if is was the distributor wouldn't we be feeling the problem all the time

[Shamb]

Dont overlook a vacuum leak, it could be an intermittent leak somewere that opens and closes... i've seen it

[yotaboy79]

theres a good possibility that its the coil and ignitor if it is i got one that should work for ya

[brainlessfool]

yea i know what a dist is i just never heard it called a pick up coil... But if is was the distributor wouldn't we be feeling the problem all the time

maybe not, it can be heat sensitive. and it's not the whole dist. it the part that takes the place of points in  newer ing. systems.

[hawaii500_1999]

Dont overlook a vacuum leak, it could be an intermittent leak somewere that opens and closes... i've seen it

i second that. 

take a look at the thermal vacum switch valves.  they get old and break sometimes.  and maybe after the motor warms up one of the valve opens and leaks.


also check out your egr components.

another thing to try is tounscrew the idle circut silinoid and remove the "O" ring from the tip, (save that "O" ring!), then screw the silinoid back in.  this will bypass the shut-off circut. 
the purpose of that part is to prevent diesiling when you shut the motor off.  so if you run with it bypassed it is good to run you idle a little lower than normal.

[4.3s10 [OP]]

Is there any difference from a igniter on a EFI truck vs. a carb truck or are they the same thing