56mm t body

craigs135s · Post by **craigs135s** » Wed Sep 06, 2006 5:36 pm

Going to fit my 56mm TB but need a small ratchet set so i can get the old one off any one got one i can borrow??

Cheers
Craig

craigs135s · Post by **craigs135s** » Thu Sep 07, 2006 11:45 pm

fitted the 56mm TB tonight all was going well until we took it out for a road test. Car feels good then slow down car revs to 3k rpm and stays there

anyone any ideas what wrong with it??

Cheers
Craig

Rich H · Post by **Rich H** » Thu Sep 07, 2006 11:46 pm

You did reset the throttle pos sensor didn't you?

craigs135s · Post by **craigs135s** » Thu Sep 07, 2006 11:55 pm

By pressing down on the peddle a few times???

Cheers
Craig

Rich H · Post by **Rich H** » Thu Sep 07, 2006 11:57 pm

Power on without start
open throttle slowly to wide open 5 times or so
power off
pause
pause
pause
power on
start
drive

TPS reset

Job's an orange root vegetable

craigs135s · Post by **craigs135s** » Thu Sep 07, 2006 11:59 pm

yip done that a good few times mate still reved to 3krpm and stayed there.

Craig

Rich H · Post by **Rich H** » Fri Sep 08, 2006 12:05 am

Mine soemtimes seems to stick at 1.5k rpm, a quick rev up settles it down again. I'm wondering if it ay be the ECU getting confused about the airflow. The MAP sensor may be out of limits dealing with the enhanced flow, but I'm only guessing.

Is the throttle actually physically closing properly? If so it could be that the IACV is fecked or just gunged up. It's easy to clean out. If not then there is your problem...

craigs135s · Post by **craigs135s** » Fri Sep 08, 2006 12:10 am

open and closing fine. Even changed the bit that the plug go's into and its still doing it.

Craig

Rich H · Post by **Rich H** » Fri Sep 08, 2006 12:17 am

Did you clean out the IACV? If the throttle is closed then it is this what dictates idle. Mine was extremely gunged up as was the pipework. Dirty IACV plug? The breather pipes are all connected and there are no holes in the inlet manifold?

Could it even be a dodgy lambda sensor? IIRC this controls the fuelling at idle to protect the cat, now I'm really guessing...

Off to bed now, good luck!

craigs135s · Post by **craigs135s** » Fri Sep 08, 2006 12:19 am

not sure Rich tbh. Cheers anyway.

Craig

Victor Meldrew · Post by **Victor Meldrew** » Fri Sep 08, 2006 12:34 am

craigs135s wrote:fitted the 56mm TB tonight all was going well until we took it out for a road test. Car feels good then slow down car revs to 3k rpm and stays there anyone any ideas what wrong with it??

Cheers
Craig

Where did the throttle come from? was it from a car thats been a non runner for a while... will free up over the next few weeks.

craigs135s · Post by **craigs135s** » Fri Sep 08, 2006 12:37 am

John bought it from TSF on here. Not sure how long its been of the other car for just know it came of a 2l rover. Only thing is if i thrash the car 7 rpm it will stick there.

Cheers
Craig

Victor Meldrew · Post by **Victor Meldrew** » Fri Sep 08, 2006 12:41 am

just add some light oil (not WD40) to the pivots and work it a bit. It should free up ok. Mine was like that for a few days but it works fine now...

I stuck with the alloy arm for the throttle and lengthened the pedal travel by adjusting the pedal stop. Dont know if your using the plastic arm from the 48mm or the alloy one. Dont know if that makes a difference or not.

craigs135s · Post by **craigs135s** » Fri Sep 08, 2006 12:45 am

it was a plastic one that was on it. Only thing is the tb is closed fully and its still at 3 rpm is that right?

Cheers
Craig

Victor Meldrew · Post by **Victor Meldrew** » Fri Sep 08, 2006 12:53 am

craigs135s wrote:it was a plastic one that was on it. Only thing is the tb is closed fully and its still at 3 rpm is that right?

Cheers
Craig

It may look closed you dont need much of a gap to get those revs...

try removing the IACV pipe or whatever its called then stick your hand over the throttle holes to see what it idles at... if the speed drops the throttle isnt closing fully.