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7th January 2020, 14:43 | #1 |
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Missfire - 75 1.8 turbo
Hi guys,
Noticed when flooring the car in fourth gear the other day, the car missfired briefly. Any idea what would caused this? Thanks.
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7th January 2020, 15:18 | #2 |
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My 1.8T has done this for years!
I've replaced plugs, leads, coil packs and even had a new turbo💨 over the years but it still persists. I have learned to drive it accordingly and don't get tempted to floor it in too high a gear. The bonus being a much improved mpg! I await suggestions on how to to solve this.🙂 Chris.
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7th January 2020, 15:19 | #3 |
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Plugs or leads breaking down under load would be my best bet, assuming that you don't have any smoke, noises etc.
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7th January 2020, 15:36 | #4 |
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No noises and no smoke as far as I know. Might change the plugs and see if it makes a difference.
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Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s |
7th January 2020, 16:27 | #5 |
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Could it be hitting the rev limit?
The boost control valve on the airbox is also a possible known cause of missfire when they get (tired).
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7th January 2020, 16:38 | #6 |
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Have you tried a reduced spark gap for the plugs? Usual suggestion is to set the gap at 0.7 - 0.5mm depending on who you ask. Try 0.6mm.
TC |
7th January 2020, 16:59 | #7 | |
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Quote:
I’ve not checked the gaps but the car was bought from a well known genius on the forum. I’d be very surprised if they weren’t gapped correctly.
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Wanted - Indian bride. Cash waiting. (All sorted - bargain) First name and forum name: Ravinder Rover 75 2.0 CDT Connoisseur SE 116 (160 remap) Royal Blue (JFM) This vehicle was the 50,481st 75 to run off the production line, out of 112,381 This vehicle was the 2,238th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 5,002nd 75 in Royal Blue (code: JFM) to be made out of 14,420 Royal Blue 75s |
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7th January 2020, 17:25 | #8 |
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A spray of WD40 (water displacer) over the leads may help in the wet weather but new leads would probably cure it if the plugs don't.
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7th January 2020, 19:04 | #9 |
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Yes,they are a known weak point.Not too expensive to replace and see if it cures it.I would re-gap the plugs first though as TC suggests if you haven't already done so.
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7th January 2020, 19:45 | #10 |
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