mr2 4age no start random
mr2 4age no start random
hey guys whats goin on, i have a 87 mr2 stock 4age cars been giving me problems for acouple months now and cant seem to figure it out..... at timesit cranks give it a lil gass nd eventually itll kick over starts idleling high then settles itself....other times it cranks real quick as if there is no compresssion or the belts broken, check compression all close to between 100-125psi, replaced fuel pump,fuel filter, plugs,check ignition timing good check over all timing good, check cold start injector working fine, i think thats pretty much it if anyone has come across this issue or knows some stuff i can try gladlly appreciate the help... thanx
Re: mr2 4age no start random
It sounds like a timing problem... maybe something has slipped ? Did you
verify TDC when you were checking the cam timing ? Like, remove the top
two timing covers and see if the dimple on the crank timing pulley is matched
to the mark on the oil pump cover at TDC ? While you are doing this you also
need to drop a length of wooden dowel, an extension from a socket set or
one of your mums #4 knitting needles down the plug hole on #1 cylinder.
Make sure the piston is at its highest point when you have the crank pulley
dimple lined up. Then check that the dimples on the cam pulleys are lined up
with the marks on the backing plate.
When all the above are lined up, check and see if the leftmost notch on the
rim of the crank pulley lines up with timing pin on the idler pulley bolt.
Cheers... jondee86
verify TDC when you were checking the cam timing ? Like, remove the top
two timing covers and see if the dimple on the crank timing pulley is matched
to the mark on the oil pump cover at TDC ? While you are doing this you also
need to drop a length of wooden dowel, an extension from a socket set or
one of your mums #4 knitting needles down the plug hole on #1 cylinder.
Make sure the piston is at its highest point when you have the crank pulley
dimple lined up. Then check that the dimples on the cam pulleys are lined up
with the marks on the backing plate.
When all the above are lined up, check and see if the leftmost notch on the
rim of the crank pulley lines up with timing pin on the idler pulley bolt.
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: mr2 4age no start random
yes i checked cam to crank timming cyl 1 tdc......ill recheck it i didnt see if notch lined up with the pin ill reply shortlly
Re: mr2 4age no start random
The reason for checking the alignment of the timing notch, is that it is not
unknown for the outer pulley ring to move on the inner hub. The outer ring
is rubber mounted to act as a vibration/harmonic damper, and if the rubber
is affected by oil it can allow the notch to move away from its correct position.
Then your ignition timing will be out even if it is perfect according to the
notches on the pulley.
Cheers... jondee86
unknown for the outer pulley ring to move on the inner hub. The outer ring
is rubber mounted to act as a vibration/harmonic damper, and if the rubber
is affected by oil it can allow the notch to move away from its correct position.
Then your ignition timing will be out even if it is perfect according to the
notches on the pulley.
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: mr2 4age no start random
Finally got around to checkin the car pin lines up with notch on pulley so yea lol any more suggestions
Re: mr2 4age no start random
Crank pulley bolt nice and tight ? Real tight ? Can't move it tight ?
Cheers... jondee86
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: mr2 4age no start random
Yea its tight .....I had my bro crank it nd it got stuck kept crankin with key out , so I dug into the igtion cylinder took out the switch nd tried starting it but nuthing changed nack to square one lol
Re: mr2 4age no start random
Sounds to me like your ignition switch took a dump. You are going
to have a lot of trouble solving this no-start issue if you can't rely on
the ignition switch putting power where it is supposed to be, and not
putting power where it shouldn't be... like on the start solenoid wire !!
So two choices... either find a replacement ignition switch, or put in
a few temporary wires to bypass the ignition switch for test purposes.
I'd recommend replacing the switch... temporary wires tend to become
permanent, and may accidentally burn your car to the ground
Cheers... jondee86
to have a lot of trouble solving this no-start issue if you can't rely on
the ignition switch putting power where it is supposed to be, and not
putting power where it shouldn't be... like on the start solenoid wire !!
So two choices... either find a replacement ignition switch, or put in
a few temporary wires to bypass the ignition switch for test purposes.
I'd recommend replacing the switch... temporary wires tend to become
permanent, and may accidentally burn your car to the ground
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: mr2 4age no start random
My buddy had a mr2 with a blown tranny he let take the colum out switched it out last night nd tried it same quick crank....I'm boutta rip my eyes out
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Re: mr2 4age no start random
Does it have fuel? Does it have spark?
Have you gone through the EFI troubleshooting section in the BGB?
If you don't have it you can find a copy at mr-2.info
Have you gone through the EFI troubleshooting section in the BGB?
If you don't have it you can find a copy at mr-2.info
Re: mr2 4age no start random
telo9393 wrote:My buddy had a mr2 with a blown tranny he let take the colum out switched it out last
night nd tried it same quick crank....I'm boutta rip my eyes out
OK. It seems that you have eliminated all the "something broke" factors (timing
being out, no spark, no fuel, no power some place important) so now we get to the
bad news part. Service limit for compression on this engine is 140psi. You have all
cylinders well below the service limit, so basically your engine is too tired to run.
The fast cranking is the engine lighting off the mixture, but the burn speed is not
fast enough to generate enough pressure to get the engine to much above cranking
speed. Occasionally (on a good day) you might get a slightly better ring seal from
oil leaking down from the seals after it sits for a while, and that will be just enough
to get it past the critical "run ya bastard" speed.
Once the engine gets past that speed, the cylinder pressure helps the rings seal
better, and blowby reduces, so the engine will actually run more or less normally
for a worn out engine. The only fix is an engine rebuild.
DISCLAIMER: I just made all this **** up, but if your engine has 300,000 miles on
it and you put a pint of oil in it every time you gas up, I don't think I'm far off
Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.
Re: mr2 4age no start random
Hey Jondee86,
I had this problem in my 87 mr2, i was missing a few teeth from the timing belt, not sure if you checked that or not, the other time i seen this ssue it was the dizzy missing teeth.
Kind Regards
I had this problem in my 87 mr2, i was missing a few teeth from the timing belt, not sure if you checked that or not, the other time i seen this ssue it was the dizzy missing teeth.
Kind Regards