[Mk2] [Turbo] what happens at 2250 revs?

[David21]

did it last year mate, probably less than a 1000 miles ago

Have you taken it for a good long motorway run recently? I only do short journey's in mine (5miles a day to work) after a month of this and no other long journeys i tend to find it doesn't run quite as smooth, so i take it for a blast for 30 miles or so and it seems to run sweet as a nut after.

[Quigonjay]

it runs fine once warm

[mr2turbo99]

lol, it only takes half hour if that! Unless you have a CC in the way...

Here's some encouragement, this is what mine looked like inside:

Image Replaced With URL For Quote http://theshado.ws/images/imoc/senderAfter.jpg

It can't have been telling the ECU much

I thought that was the Cold start injector timer switch?

[toxo]

Rev3+ doesn't have the cold start circuit

[mr2turbo99]

Ah, i stand corrected

[mrdb]

I know a little raised from past but,

I would check your ignition coil as i had exact same misfire at 2500 - 3000rpm when cold that would clear when warm and it turned out to be a hairline crack in coil that would seal when it warmed up....

misfire was so bad it would not rev at all past 3000rpm. It would then just clear and not return until car was left over night or for a long period of time...

[Quigonjay]

slowly rulling things out, not the o2 sensor, got a replacement tps to try out, if it is not that i guess i will give the coil a try, wonder if there is a test for it in the bgb?

EDIT: there is a test to check the resistance but not sure if it is relevant to finding a fault like a crack in the casing, i'll give it a try anyway

http://www.mr2-tech.com/bgb/mechanical/ ... system.htm

[Quigonjay]

have tested the coil and tps according to the bgb, neither are within the set limits

[Quigonjay]

have tested the coil and tps according to the bgb, neither are within the set limits

how is it my car is not running like a dog if according to the bgb, these parts are faulty?

[Jim Galbally]

youd be surprised just how driveable cars with faulty fueling actually is mate! ive seen cossies with TPS's wired thewrong way round (ie 0% throttle regists as 100% and visa versa!) and the cars still appear to drive ok.

fix the fault and all of the sudden the cars come to life and people realise how bad it was before!

[Quigonjay]

even non toyta part is £90 for a new tps
not messing with any more duff second hand ones

http://www.camskill.co.uk/products.php? ... s606p11807

[toxo]

Any joy yet Jay? Now I've sorted my brakes out my 2500rpm stutter is back

[Quigonjay]

not yet mate, cant afford to get a new tps and coil at the moment
was the fix on the brakes?

[toxo]

Oh it was something really really stupid, and won't be the cause of your problems. Somehow the pedal had become maladjusted and needed readjusting to apply enough pressure.

[Quigonjay]

update time
firstly, i was mistaken that it wasnt happening when warm, it was just more noticeable when cold

the tps made no difference as after checking mine again it was within bgb limits (must have used the wrong reading on the ohmeter or something)
the coil has made a difference from cold, so now, instead of being worse when cold, it is just the same all the time
hardly noticable now but still
running out of things to try

[toxo]

We may have made progress with mine - Luke is pretty sure my inlet manifold gasket is leaking which would throw the MAP sensor out.

I'm taking the car off the road next month to strip some bits off and the inlet tract will be cleaned out along with a new gasket (needs doing as its full of old oil buildup) so I will let you know how that goes.

[Quigonjay]

might give that a try, not much else i can do

[toxo]

Have you got an aftermarket boost sensor / gauge running off the feed that goes from the inlet manifold to the MAP sensor?

http://www.imoc.co.uk/forums/viewtopic. ... 52#1262152

[djpkins]

have you checked around the turbo/dp for any leaks or cracks...mine was very similar and I found that the dp had spiderweb like cracks in it...once welded up it was sweet...isn't your original running problem around the 2250rpm mark, turbo spool up time.