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1.9 Petrol jumps and jolts occasionally on long journeys?

Posted: 10 Mar 2022, 18:01
by Kermit the Van
On long motorway journeys my T25 occasionally jolts and skips. It will stop if i release the accelerator for a second then put my foot back down. I presume its a fueling issue, i did a basic rebuild on the carb and swapped out most servicable parts and it still happens. Anyone got any idea what this could be?

Re: 1.9 Petrol jumps and jolts occasionally on long journeys?

Posted: 11 Mar 2022, 20:11
by maxstu
Blocked fuel filter near petrol tank restricting flow?

Re: 1.9 Petrol jumps and jolts occasionally on long journeys?

Posted: 11 Mar 2022, 20:52
by Kermit the Van
maxstu wrote: 11 Mar 2022, 20:11 Blocked fuel filter near petrol tank restricting flow?





Replaced the filter recently, seems to be fine. Van drives really well usually, just occasionally on motorways it will start sputtering

Re: 1.9 Petrol jumps and jolts occasionally on long journeys?

Posted: 11 Mar 2022, 21:30
by maxstu
Did it suffer from this issue before partial rebuild?
Sticking to fuel, there are two more filters associated with the carb... it's a pierburg, l presume? A conical one where feed pipe enters carb. And another cage at the top of the carb, often missing.
Only on motorways? Or above certain revs? Will the spluttering rear its head if revving at standstill and in neutral?
Carb float height incorrect?