lumpy on starting - DIY cure
Discussion
After my Tamora gets serviced, it always starts well and ticks over smoothly when cold. Over time it deteriorates so that starting and tickover need some throttle applied when cold (stalls if you take your foot off the gas). It starts being a bit of a pain about half way between services.
Is this throttle body balance?
Whatever it is, is it a DIY job to do whatever the gge does to sort this? IYSWIM!
Ta
Bert
Is this throttle body balance?
Whatever it is, is it a DIY job to do whatever the gge does to sort this? IYSWIM!
Ta
Bert
Halfway along the six inlets under the fuel rail there is an allen grub screw (lower one of the two) with an 8mm locknut on it for idling rpm, push backwards to check, the revs should increase. With engine cold loosen 8mm locknut and turn allen screw clockwise a quarter of a turn, start engine and check idle rpm, set to 650/700 cold, when hot this will increase to about 800/850 rpm, tighten 8mm locknut, takes about 5 mins to do.
Tamster. said:
Halfway along the six inlets under the fuel rail there is an allen grub screw (lower one of the two) with an 8mm locknut on it for idling rpm, push backwards to check, the revs should increase. With engine cold loosen 8mm locknut and turn allen screw clockwise a quarter of a turn, start engine and check idle rpm, set to 650/700 cold, when hot this will increase to about 800/850 rpm, tighten 8mm locknut, takes about 5 mins to do.
Trouble is that hot tickover is fine, so I wouldnt really want to up it.
Is it peoples' view that it is not going to be throttle body balance?
Bert
Hi !
It is possible to do it yourself, but you need some instruments. I did it on my SP6 and it runs great now.
The instruments you need is a vacuum meter to see that all the throttles is taking in the same amount of air. You also need a instrument to check that you have the correct reading on the throttle pots. The TVR software ís the best to have but it is possible to do with a multi meter.
On my car it made a big difference on the adaptive maps when I did the adjustments. The adaptive maps is now more even with each other and smother through the rev range up to 4000 rpm.
// Peppe
It is possible to do it yourself, but you need some instruments. I did it on my SP6 and it runs great now.
The instruments you need is a vacuum meter to see that all the throttles is taking in the same amount of air. You also need a instrument to check that you have the correct reading on the throttle pots. The TVR software ís the best to have but it is possible to do with a multi meter.
On my car it made a big difference on the adaptive maps when I did the adjustments. The adaptive maps is now more even with each other and smother through the rev range up to 4000 rpm.
// Peppe
custardkid said:
balance fine, had PPC reset the pots the other week.
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
Does anyone know what the various settings on the laptop should be ?? e.g does it self config the throttle pots or is this something that requires actual manual adjustment in the engine or on the laptop ??
thanks
Scott
scotty1 said:
custardkid said:
balance fine, had PPC reset the pots the other week.
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
Does anyone know what the various settings on the laptop should be ?? e.g does it self config the throttle pots or is this something that requires actual manual adjustment in the engine or on the laptop ??
thanks
Scott
not an expert but.... both
PPC reset them on the laptop and all was fine, and commented that who ever had set them up last time (mechanically) had done a good job (Dulford)
on the lat top you just hit the reset button, and in theory they should balance, but i guess they wont if they a mechanically maladjusted.
Custard
custardkid said:
scotty1 said:
custardkid said:
balance fine, had PPC reset the pots the other week.
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
anyway cleaned around the butterflies, and hay presto no hunting when cold, brilliant
Custard
Does anyone know what the various settings on the laptop should be ?? e.g does it self config the throttle pots or is this something that requires actual manual adjustment in the engine or on the laptop ??
thanks
Scott
not an expert but.... both
PPC reset them on the laptop and all was fine, and commented that who ever had set them up last time (mechanically) had done a good job (Dulford)
on the lat top you just hit the reset button, and in theory they should balance, but i guess they wont if they a mechanically maladjusted.
Custard
MMMMmmmmm that's interesting, when I have watched my dealer give the car a tune they never really appeared to do anything, I wonder if it really is as simple as plugging it in and pressing reset...
Custard are you talking from experience or a bit of guess work - no offense intended by btw
cheers
S
Have experiance the Laptop fix, but not the manual set up.
I was stood next to Paul at PPC when he checked for fault codes on the laptop, and then reset the throttles (adaptive maps??? peppe will be along it a bit he's a wiz at this stuff)
as he pressed the reset button the idle noticable sounded smoother. the bonnet remained bolted down!
my guess it that its probably abit of an art to get them perfect, involving a combination of the software and greasy spanner
Custard
I was stood next to Paul at PPC when he checked for fault codes on the laptop, and then reset the throttles (adaptive maps??? peppe will be along it a bit he's a wiz at this stuff)
as he pressed the reset button the idle noticable sounded smoother. the bonnet remained bolted down!
my guess it that its probably abit of an art to get them perfect, involving a combination of the software and greasy spanner
Custard
custardkid said:
Have experiance the Laptop fix, but not the manual set up.
I was stood next to Paul at PPC when he checked for fault codes on the laptop, and then reset the throttles (adaptive maps??? peppe will be along it a bit he's a wiz at this stuff)
as he pressed the reset button the idle noticable sounded smoother. the bonnet remained bolted down!
my guess it that its probably abit of an art to get them perfect, involving a combination of the software and greasy spanner
Custard
I was stood next to Paul at PPC when he checked for fault codes on the laptop, and then reset the throttles (adaptive maps??? peppe will be along it a bit he's a wiz at this stuff)
as he pressed the reset button the idle noticable sounded smoother. the bonnet remained bolted down!
my guess it that its probably abit of an art to get them perfect, involving a combination of the software and greasy spanner
Custard
Cool, cheers for the info
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