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Idle Surge after turbo install 


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 Post subject: Idle Surge after turbo install
Posted: Thu Apr 03, 2008 4:43 pm 
Getting Side Ways
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Posts: 1043

Joined: 7th Feb 2005

Location: Canberra
ACT, Australia

I finally got off my a** and installed a turbo on my ED, im running an EMS 8860 with a 'Turbotrana' base tune. Anyway it started all good and then idled fine until it started to get warm, at that point it started surging from virtually 0rpm to 1500rpm and continues to do it until it stalls (usually after a half a dozen surges) I can get it to idle if I hold the throttle, but is very laggy.

I thought it was a vacuum leak as the MAP hose was split on the end, but fixing that didnt help. I also thought it maybe the ISC as it makes a rattling noise when the ignition is on, but there was no effect when I disconnected it.

Any ideas?



1993 ED XR6 5speed Polynesian Green. Project car.

1998 EL XR8 Auto Hot Chilli Red. New daily and project

Posted: Thu Apr 03, 2008 9:43 pm 
Smokin em up

Posts: 264

Joined: 19th Sep 2005

Location: Perth
WA, Australia

You need to tune it. There is nothing wrong, when you put the turbo on it has changed the fueling requirements and it needs to be adjusted.

You need to get a wideband connected and learn how to use the autotune feature on the EMS8860.

This is something that you can easily tune yourself.

Its probably running in the lean area so the easiest way to get it running a bit better is just to "trim" the fueling up till she settles.

It started fine because the choke (extra fueling) was on when cold.

But you really have to adjust the fueling map to the desire Air/fuel ratios. The n/a tune is a good starting point.



Turbo 6s rule

Posted: Thu Apr 03, 2008 9:58 pm 
Getting Side Ways

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Ride: Supercharged BA XL ute

Location: Gordonvale
QLD, Australia

I'd say turbotrana is on the money.
Stay with it man you'll get there.



BA XL ute.
P'maker headers',Hi flow cat,3" sports sytem,
Raptor V-clutched lightweight not intercooled,no tranny cooler,no worries.

Posted: Fri Apr 04, 2008 11:31 am 
Stock as a Rock
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Location: The town of many Crows.
NSW, Australia

the ecu dosent know what to do yet



XR6 conversion, CAI, 3inch intake, modified intake plenum, polished TB, 2.5inch exhaust, modified cat, pwr radiator and expansion tank, BTR, kevlar bands, JMM 3K converter, shiftkit, 3.91, 31spline spool, 31spline billet axel$, Nolathane, RDA golds, Custom interior, genuine GT's

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