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LPG, CNG & LNG - General Info and Issues Share experiences and problems |
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01 v70 2.4t misfire on lpgViews : 2083 Replies : 6Users Viewing This Thread : |
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Nov 7th, 2017, 20:16 | #1 |
Junior Member
Last Online: Aug 14th, 2022 20:57
Join Date: May 2010
Location: Mildenhall
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01 v70 2.4t misfire on lpg
I have a 2001 v70 2.4t auto on a Vialle LPi system
On petrol it runs well and pulls hard through the rev range. I've recently replaced the plugs as a baisc service was needed and the car is new to me. Also because on LPG under hard acceleration I noticed it was missing and losing power. Flashing ECU light. Turns out I've got a misfire on cylinder 3. Got 2 good used coils. Replaced cylinder 3 twice with known good coils. Still persists. When accelerating on LPG and giving it full throttle it will bog and miss, switch over to petrol it's like turning on a rocket booster. So it has to be LPG fuel delivery. Ideas? |
Nov 8th, 2017, 20:05 | #2 |
Premier Member
Last Online: Jan 15th, 2022 11:23
Join Date: Feb 2009
Location: Salisbury (ish)
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LPG needs a stronger spark than petrol so any weaknesses in the ignition system will be more apparent when running on gas. Volvo branded spark plugs seem to be more suited to their engines that other brands (based on what I've read on the forum) and usually when using standard plugs, the advice is to reduce the gap by 0.1mm.
Worth also getting LPG system serviced and possibly retuned. I can only comment on BRC and Prins systems that I've got, but sometimes you need the technician to tune the system via the laptop while car is being driven to get it to run seamlessly. I'd previously had my BRC system setup 'perfectly' on the emissions analyser but when trying to drive the vehicle, it wouldn't pull the skin off custard, but a 20 minute blast round the countryside with the chap updating the mapping in the ECU returned it to full performance.
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2008 XC70 3.2 SE Lux with LPG conversion - current 2005 XC70 D5 SE Lux - sold 2004 XC70 D5 SE Lux - written off by another XC70 2001 V70 D5 - sold 2000 V70 Classic 2.4 - sold |
Nov 8th, 2017, 20:45 | #3 | |
Junior Member
Last Online: Aug 14th, 2022 20:57
Join Date: May 2010
Location: Mildenhall
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Quote:
I fixed it today actually. I did a few things so I can't say for sure what the fix was but I'm pretty sure it was a bad Lpi injector. It now pulls strong on Petrol and LPG What I have done in summary: replaced all plugs with Bosch plugs replaced coil on offending cylinder (twice). Today I replaced the brand new Bosch spark plug with a genuine Volvo USED part. Just on that cylinder. I also replaced the LPi injector on the offending cylinder and shuffled the coil packs around as I read about the inaccuracy of the specific cylinder being identified as culprit for missfire. Took the car out and it ran better than ever. Fantastic. |
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Nov 10th, 2017, 07:55 | #4 | |
Classic P80 1999 BiFuel
Last Online: Mar 6th, 2024 00:34
Join Date: Aug 2012
Location: 48mph Middle Lane M4
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Quote:
Iffy coil-packs will work on petrol for thousands of miles but will throw a hissy on gas.
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Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl**dy blah."] |
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Nov 10th, 2017, 09:58 | #5 | |
Junior Member
Last Online: Aug 14th, 2022 20:57
Join Date: May 2010
Location: Mildenhall
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Quote:
I think for the sake of clarity at some point I'll switch back to the Bosch plug and see how it does and same with injector |
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Nov 25th, 2017, 14:11 | #6 |
Classic P80 1999 BiFuel
Last Online: Mar 6th, 2024 00:34
Join Date: Aug 2012
Location: 48mph Middle Lane M4
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Oddly, only yesterday and yet again, I've replaced a coil-pack. Must be the third or fourth I've done to date. I've built a stock of them! Maybe you're not done with them yet?
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Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl**dy blah."] Last edited by CNGBiFuel; Nov 25th, 2017 at 14:24. |
Dec 7th, 2017, 11:08 | #7 | |
Monster Raving Loony
Last Online: Nov 12th, 2018 20:03
Join Date: Oct 2013
Location: hitchin
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Quote:
You've got it working better than ever - leave it alone !
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1994 850 2.0 bought at 32,000 miles used daily now 45,000. Still like a nearly-new car 2004 filthy polluting diesel VW |
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