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20th July 2016, 11:04 | #11 | |
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2005 Connoisseur SE 1.8 Turbo,2004 45 1.8 Connoisseur and my beloved 1998 VVC Coupe. Join Date: Nov 2009
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20th July 2016, 13:10 | #12 |
I really should get out more.......
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The recently new standard solenoid developed or has occasional stuttering issues with the 200ps tune ECM. With the 160ps ECM fitted the same solenoid is working nicely with absolutely no stutter at all.
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20th July 2016, 14:16 | #13 |
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Tried a different MAP sensor? thats what the ECU relies on to read the boost if thats dying at high boost that'll give you your stutter.
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20th July 2016, 23:22 | #14 |
This is my second home
2005 Connoisseur SE 1.8 Turbo,2004 45 1.8 Connoisseur and my beloved 1998 VVC Coupe. Join Date: Nov 2009
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Has to be something other than the solenoid,there are many cars running the new tune without issue using the OE valve.As previously stated check plug gap if not already done.
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21st July 2016, 07:39 | #15 |
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I had the k maps tune and all original parts, it worked fine.
I had plugs gapped at 1mm, original boost solenoid, new leads and coil packs and new vacuum hoses. All genuine parts. I did find that the boost solenoid failed quickly and I ended up using three of them in two years. |
23rd July 2016, 03:20 | #16 |
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worth checking the wastegate is functional too - not stuck
Paul... |
6th September 2016, 20:13 | #17 |
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I had terrible misfire on full throttle with both the standard and 'MAC' solenoid valves. I was convinced it was an over-boost issue as it was so violent. I decided to get Mark at Kmaps to look at it and check the manifold pressures. He confirmed it was an ignition issue as it was occurring well below the ECU overboost threshold and went away when the solenoid was disconnected - i.e. wastegate always fully open so minimal boost.
I re-gapped the plugs to 0.5mm as suggested and as also well documented on the forum. Problem disappeared - it was like night and day!! I never would have believed re-gapping from 0.7mm down to 0.5mm would make such a difference. Car now runs like a dream..
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9th November 2016, 14:45 | #18 |
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well mine has also started running with a bit of a mis (between 2400 and 2800rpm), and never having driven it as a 160 I was a bit stumped.
I've gaped the plugs down to 0.5mm and it's a different car, no miss and it really flies. How ever the downside is that at tick over it's really hunting, so I'm going to gap them up to 0.6mm and see if that helps
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9th November 2016, 15:15 | #19 |
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Well gaped to 0.6mm and ticks over lovely. Just need to take it out for a run and see how it behaves
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David Impecunity is the mother of ingenuity Useful how to's for common problems Car Of The Month Jan 2014 [SatNav Power Down] [Coolant Level] [SatNav Repair] [Diesel Non Starting] [Paint Codes] [Rear Light Seals] [Reversing Light Switch] [Bleeding Brakes][Sunroof Drain] [Early ZT's][Instrument Pack Diagnostics][ATC Diagnostics] |
24th December 2016, 21:32 | #20 | |
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where do you get your boost pressure readings from? I've fitted a VVC Inlet Manifold - and Connected a Boost Gauge to the Manifold - my standard tune 75 1.8t gives readings for Boost at 6-7psi (lower gears/revs) Building to around 9-10psi - depending how/where full throttle is applied, boost will build to and hold 12psi - esp, cruising in 4th 5th and and flooring it. I've maxed out at 15psi - with no fuel cut - and no issues of overboost I'm running a recently replaced OEM spec Pierburg Solenoid - the last one lasted a year after doing the Manifold swap i developed a slight misfire - confirmed(to me ) by the Boost Gauge as "Misfire" and not "overboost" - regapped plugs from around 0.80 - 0.60 and no issues with any misfire on full throttle since I've even thought of fitting a manual Boost Control inplace of the Solenoid ? turn Boost up to a constant 15psi max before any release ? would the ECU not "learn" and adjust fuelling etc for the change ? "Homebrew" Re-map ? Paul. Last edited by Sheraton; 24th December 2016 at 21:38.. |
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