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Gtir Motorsport club » General Discusion » Gtir related Discussion » Power problem

Power problem

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101 Re: Power problem on 12th March 2017, 12:30 pm

Mr B

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gtir technician
gtir technician

102 Re: Power problem on 12th March 2017, 1:37 pm

ADSgtir


It's a bit tricky to diagnose idle quality : your cams have been moved , we don't know where , this can effect the idle vacuum - that is the amount of air that the engine pulls in to run at idle .
Also you map has been set for your injectors (larger)at that idle vacuum and maybe even with a vacuum leak on top (split hose )
You really need a good tuner to find out where you are currently and start from scratch and make adjustments as necessary : throttle cable , cold start values , idle targets , vacuum , fuel pressure etc

103 Re: Power problem on 12th March 2017, 3:37 pm

Mr B

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gtir technician
gtir technician

Was running okay for some time after the cam sprockets/tune and this issue developed after turbo failure.
Could be worth looking at idle assembly incase turbo debris or general old age affecting it . Also lambda worth checking if using one .

104 Re: Power problem on 12th March 2017, 4:16 pm

PartyPete

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the one star club
the one star club
Had the idle assembly out and stripped a couple weeks ago and all was fine. The idle adjustment screw is that chewed up and fucked I can't turn it to adjust to see if that helps!

105 Re: Power problem on 17th March 2017, 8:46 am

PartyPete

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the one star club
the one star club
So...looks like I've cured the idle issue....any one want to take a guess at what was causing it? ( it wasn't any of the parts I've replaced that I listed above)....

106 Re: Power problem on 17th March 2017, 9:10 am

mike74

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Leprechaun put a hex on your lambda sensor?

107 Re: Power problem on 17th March 2017, 9:14 am

Cosmic73

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Was it the onset of Alzheimers making your foot shake? Very Happy Very Happy

108 Re: Power problem on 17th March 2017, 9:34 am

PartyPete

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the one star club
the one star club
Close guys but not quite.....any others?

109 Re: Power problem on 17th March 2017, 10:09 am

Gostek

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Events Organiser
Events Organiser
Glow plugs? Or sticky vtec solenoid??


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110 Re: Power problem on 17th March 2017, 10:12 am

Cosmic73

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Fuel pump? bad earth?

111 Re: Power problem on 17th March 2017, 11:51 am

Stu

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Admin
Admin
Vacuum box behind the plenum?


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112 Re: Power problem on 17th March 2017, 12:09 pm

Mr B

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gtir technician
gtir technician
^ another air leak so pulling air not being metered at idle !

113 Re: Power problem on 17th March 2017, 1:48 pm

PartyPete

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the one star club
the one star club
For what ever reason the idle screw was screwed all the way in, it was all mashed up but managed to get a sharp screw driver in and turn it out....and hey presto it suddlenly started idling like a brand new un'

114 Re: Power problem on 17th March 2017, 1:53 pm

Stu

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@Mr B wrote:^ another air leak so pulling air not being metered at idle !
Thats exactly what was wrong with mine B.


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115 Re: Power problem on 17th March 2017, 1:57 pm

Cosmic73

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@PartyPete wrote:For what ever reason the idle screw was screwed all the way in, it was all mashed up but managed to get a sharp screw driver in and turn it out....and hey presto it suddlenly started idling like a brand new un'

I was going to say that but assumed it would be the first thing you tried

116 Re: Power problem on 17th March 2017, 2:00 pm

Mr B

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gtir technician
gtir technician
Kind of makes sense as with air leaks it likely revving high so someone at some point counteracted it by winding in that idle screw .
I seen similar on a car with a split diaphragm recirc valve and idle had been restored by winding screw in all way, took me quite some time after fitting a new external valve to figure that out though lol.
well done for chasing it down, should be looking good for next mapping session, fingers crossed for pleasing results ... persistence will payoff bounce

117 Re: Power problem on 17th March 2017, 2:00 pm

mike74

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this has got to be the only R ever made to have an idle issue resolved by turning the idle screw  Shocked
glad its sorted though

118 Re: Power problem on 17th March 2017, 2:02 pm

Mr B

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gtir technician
gtir technician
@Stu wrote:
@Mr B wrote:^ another air leak so pulling air not being metered at idle !
Thats exactly what was wrong with mine B.
So yours was vacuum box, was it pipe missing or a split or something ?

119 Re: Power problem on 17th March 2017, 2:04 pm

PartyPete

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the one star club
the one star club
We didn't look at it and think ' let's try that' but as we tried it was that chewed up and fucked we couldn't turn it, had to get a screwdriver on the grinder and get it very sharp and hammer it in to the plastic screw to get it to turn, only just managed to turn it

120 Re: Power problem on 17th March 2017, 3:27 pm

Stu

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Admin
Admin
@Mr B wrote:
@Stu wrote:
@Mr B wrote:^ another air leak so pulling air not being metered at idle !
Thats exactly what was wrong with mine B.
So yours was vacuum box, was it pipe missing or a split or something ?
Pipes missing.
The large ones on the side.
So was a mass of un metered air.


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121 Re: Power problem on 17th March 2017, 6:02 pm

johnny gtir

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moderator
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@PartyPete wrote:We didn't look at it and think ' let's try that' but as we tried it was that chewed up and fucked we couldn't turn it, had to get a screwdriver on the grinder and get it very sharp and hammer it in to the plastic screw to get it to turn, only just managed to turn it

They plastic ? Sure mine ain't

122 Re: Power problem on 17th March 2017, 6:03 pm

Gostek

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Events Organiser
Events Organiser
I might be wrong but I think there suppose to be plastic blanking plug


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123 Re: Power problem on 17th March 2017, 6:16 pm

shroom

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All I have looked at are deninately metal?

Glad its sorted anyway or getting better

124 Re: Power problem on 17th March 2017, 6:23 pm

PartyPete

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the one star club
the one star club
@shroom wrote:All I have looked at are deninately metal?

Glad its sorted anyway or getting better

We will find out next Friday...

125 Re: Power problem on 17th March 2017, 10:22 pm

shroom

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I will have a look at mine tomorrow. Will you be bringing the R to Japfest ?

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