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What causes a 22r engine to back fire - Cars & Trucks

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Sounds like burnt valve

Posted on Nov 23, 2013


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93 Toyota ect cab 4x4 22r motor spark plug firing order

I would order a Chilton manual for your truck. eBay is a good place to get one ($25).

Apr 19, 2015 | Toyota Cars & Trucks

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Vacume hose diagram

what engine ? 22R-TE, 22R, 22R-E California or federal? give me your engine i'll send you the vacuum diagram.

Jun 07, 2014 | 1987 Toyota Pickup

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1987 toyota 4runner blowing #8 ignition fuse.

behind the 8 ball........?????
How to find reason?
22R-E and 22R-TE engines? or ?
it means there is a short, and the fuse saved the for sure fire.

is fuse 8 in the dash box.?
what is the output side fuse 8 wire color.?
how many amps.?
why is fuse #8 un-named?

Feb 16, 2014 | Toyota Cars & Trucks

1 Answer

Truck does not start reads code 12 spark seems to be of and backfires when I try to start

what engine? size? 22R 22RE or 3F-E? 3VZ-E?
never work an car with out knowing what engine and if old EFI or carb.
look at it , in USA the under hood sticker clearly states engine in car.
does your motor have a timing belt for the cam>?
ever change it every 60K,,, oops////
on old cars ,and this one is.
I always check compression,, at WOT, (wide open throttle)
if 80psi the cam slipped. if 150PSI x4 its a winner

next is spark, if the cam slips, BTW< the spark timing is GONE
OUT TO LUNCH timing, no , dont change it ,fix the belt first.
and back firing is caused by bad timing....
22R and 22R-E engines have a cam chain.
but seen many cars with a screaming chain, owners ignore it....
seen them slip too.. as hard as it is to believe. (im never shocked)

#2, do that 60k tuneup for spark and filters now, amazing what a simple tune up does, with new spark wire, in winter they short.
and air filter and fuel filter,

spark timing> spec:
At idle the 22R-E should read 10-14deg BTDC, 3VZ-FE should read 8deg BTDC, and the 3F-E should read 12deg BTDC.
if way off, the cam is out of time. (no one messed with engine)

code 12
means the ECU found a dead sensor (spark) NE, G1 or G2
these are all sensors for spark, cam or crank or both.
the FSM covers this.
code 12 are loss of sensor for 2 second cranking
and is a bad sensor, not calibrated , or bad wire to it,, etc.
think about this. (no engine stated, so generic answers happen)
IF the cam is off time.
the CAM sensor is fibbing, as compared to the crank sensor.
so it would not be a suprise to me, that code 12 throw.

that is why i check spark timing first. then if way off
check compression 2nd, and if way off.
time 4
the cam end is exposed and timing verified.

if engine is interference type, is use a total different strategy.
do no harm, is first. (visual inspections of cam are first)

next time post the engine you have.
merry Chrismas and hope we find it fast.

Dec 24, 2013 | 1991 Toyota Pickup

2 Answers

I replaced my 1985 22r engine with an 22re engine,using carb off old engine. do i have to also replace my distrubutor and coil/igniter

repost with the spec differences beween the two engines Im a bit foggy here..Im thinkin one had or has intake restrictor plates under the intake for not letting hot gasses enter under the carb mount...

Jan 17, 2013 | 1985 Toyota Pickup

1 Answer

Stalling 22r 1983 toyota truck 22r fires up, runs great then cuts out. fuel bowl goes empty and i've replaced everything, pump, filters and cleaned tank

Check the steel fuel line under the intake manifold
had one that was almost completely clogged shut with ****
took a month of hunting but found this to be the problem

May 16, 2012 | 1983 Toyota Pickup

1 Answer

Vacuum diagram for 1987 toyota pick up


Fig. 11: Emission system component layout and vacuum diagram-1987 22R-E engine


Fig. 12: Emission system component layout and vacuum diagram-1987 22R-TE engine


Fig. 13: Emission system component layout and vacuum diagram-1987 22R engine (Federal and Canada)


Fig. 14: Emission system component layout and vacuum diagram-1987 22R engine (California)

Hope helps with this (remember comment and rated this).

Jul 15, 2010 | 1987 Toyota Pickup

1 Answer

I have a86 22r that the carb is loading up and back firing out the exhaust nothing has been messed with

an exhaust backfire is usually caused by the engine not getting enough gas, having too much air and less fuel causes this. the second barrel may not be putting out fuel. Try cleaning the linkage with spray, be carefull not to spray any rubber parts on it tho. manually operate the throttle while the engine is off while you clean it. This usually solve the problem.

Aug 04, 2009 | 1986 Toyota Pickup 4WD

1 Answer

1985 toyota 4x4 pickup/22R engine

put new contact point in the disrabuter,
22R has chain not belt you can check if the chain is off remove cylinder head cover you can see on front side of the engine,

Sep 10, 2008 | 1991 Toyota Pickup

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