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ME7 Idle; solved = better braking, improved economyViews : 1374 Replies : 6Users Viewing This Thread : |
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Jun 11th, 2006, 18:48 | #1 |
aka Whitey
Last Online: Sep 8th, 2008 00:34
Join Date: Nov 2003
Location: Walton-on-Thames, Surrey
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ME7 Idle; solved = better braking, improved economy
Hi peeps
Thought I would share my findings Just for history; I have had a bad idle since I have had the car, fluctuating +/- 100 rpm, occasional hesitation and stalling. The car has had 3 ETMs each resulting in the same idle result. I have discovered the root cause for this fault: a failed non-return valve on the EVAP system (pollution control). This was allowing a direct air leak at idle from the inlet piping to the manifold. Testing involves "sucking and seeing" lol; remove the pipe from the inlet tube and you should be able to suck, but not blow. To remedy this, I inserted an extra non-return valve (as I am on a budget and didn't fancy paying £48 + vat from Volvo). The OEM valves also acts as a reducer, hence my reason for keeping it. Results are SOLID IDLE (glourious to me as this has been a pain in 2 years ownership and £££s), better braking power (due to increased manifold vacuum under engine braking) and I have already seen a marked improvement in MPG (I used to see 230 to a tank normal driving. After running the tank dry from half a tank with the fixed leak, I am seeing 260 I'll report back how many miles from a full tank!) Hope this helps some peeps and it's really quick to check out. Chris
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3" SW Autos turbo back exhaust - Custom intake - S60R Green Injectors - TD04-19T turbo - MTE ECU remap - BSR Boost Gauge - Powerflex / QBM bushes - 19" Volvo Pegasus alloy wheels - Porsche 993 Turbo Big Red calipers - Volvo S60R front discs - AP Racing Pads - 2004 headlamps and indicators - Koni Yellow Suspension Kit
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Jun 11th, 2006, 19:05 | #2 |
Rubbing son is racing....
Last Online: Jan 18th, 2017 14:26
Join Date: Nov 2004
Location: London
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Nice one Chris, attention to detail always pays off in the long run.
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Engineer |
Jun 11th, 2006, 19:08 | #3 |
Premier Member
Last Online: Nov 17th, 2023 00:15
Join Date: Dec 2004
Location: Glasgow
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Had you also noticed a problem when braking when you had the problem? Could this also affect my S40 2.0T as you symptoms sound similar to what I get occasionally.
Chris |
Jun 11th, 2006, 19:36 | #4 |
Rubbing son is racing....
Last Online: Jan 18th, 2017 14:26
Join Date: Nov 2004
Location: London
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My 2.0 S40 2001my non turbo has a similar set up so worth checking out mate.
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Engineer |
Jun 11th, 2006, 19:45 | #5 | |
aka Whitey
Last Online: Sep 8th, 2008 00:34
Join Date: Nov 2003
Location: Walton-on-Thames, Surrey
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Quote:
Chris
__________________
3" SW Autos turbo back exhaust - Custom intake - S60R Green Injectors - TD04-19T turbo - MTE ECU remap - BSR Boost Gauge - Powerflex / QBM bushes - 19" Volvo Pegasus alloy wheels - Porsche 993 Turbo Big Red calipers - Volvo S60R front discs - AP Racing Pads - 2004 headlamps and indicators - Koni Yellow Suspension Kit
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Jun 11th, 2006, 20:22 | #6 |
Premier Member
Last Online: Nov 17th, 2023 00:15
Join Date: Dec 2004
Location: Glasgow
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Where did you get the extra non return and where does it go?
Thanks for the info. Chris |
Jun 11th, 2006, 20:27 | #7 |
aka Whitey
Last Online: Sep 8th, 2008 00:34
Join Date: Nov 2003
Location: Walton-on-Thames, Surrey
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Hi there
Luckily I had a suitable one at home. I've visited several autofactors and non were ANY help, lol. I reckon they can be bought from Volvo reasonably - the parts guy I had was totally useless. I have also seen some on EBay that would work. Chris
__________________
3" SW Autos turbo back exhaust - Custom intake - S60R Green Injectors - TD04-19T turbo - MTE ECU remap - BSR Boost Gauge - Powerflex / QBM bushes - 19" Volvo Pegasus alloy wheels - Porsche 993 Turbo Big Red calipers - Volvo S60R front discs - AP Racing Pads - 2004 headlamps and indicators - Koni Yellow Suspension Kit
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