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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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V40 1.9D 115 lacking power, idle and noise issuesViews : 1613 Replies : 16Users Viewing This Thread : |
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Jul 7th, 2019, 18:17 | #11 |
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The Following User Says Thank You to Dirty Diesel For This Useful Post: |
Jul 9th, 2019, 17:32 | #12 |
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Right, I've driven it home from work and just got back. Can't say about the idle speed, as I barely had it idling. But it doesn't feel any different power wise. In 2nd you can't really tell, but in 3rd it just doesn't have the same throw you back in the seat aspect that the 1.9D has.
Still sounds too loud at 1600-1900RPM too. Can't really notice much difference. At ½-⅔ throttle, it still seems fairly normal, but it's when you're at WOT that it just doesn't pick up the same. When it was running right, I could have it launch up a decent gradient of hill with now problems, and now I don't even get the same speed on a flat |
Jul 9th, 2019, 18:02 | #13 |
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Check the cambelt timing.It only has to be 1 tooth out.Anymore than that,you'll bend valves.
See if there's any cam/crank correlation/synch codes. |
Jul 9th, 2019, 19:19 | #14 | |
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Quote:
Funnily enough I can hear the N75 Valve (vacuum control solenoid) buzzing again. Last time this happened, it was a brand new solenoid and needing replacing (currently on it's third solenoid |
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Jul 9th, 2019, 22:00 | #15 | |
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Jul 10th, 2019, 04:20 | #16 | ||
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I'll go back to my first suggestion of pressure testing the intercooler as for when a diesel pops a boost hose or has split an intercooler it'll produce lots of black smoke due to incorrect fuel to air ratio. You may have a hairline crack somewhere which may also explain the odd idle. If you think it's more like a labouring engine then you may need to check the cat isn't semi blocked with oil/carbon deposits. Again, the intercooler being the easier of the two to check. Also...the lower boost hose off the bottom of the turbo were known to split on these.
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Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav. |
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Jul 11th, 2019, 21:53 | #17 |
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To bypass the n75 solenoid, get yourself a 3 way adaptor and put it in the pipe work instead of it.If it boosts fine, then there is your problem.Check the vnt actuator on the turbo isn't seized by using a mitivac connected to the actuator pipe to suck the actuator.Or suck it with your mouth.If it moves then the actuator is ok.
Check the cam timing by removing the bolt from the lower front right corner of the engine block ,next to the coolant pipe and putting a timing pin in and turn the crank pulley by hand until it locks.The camshaft timing is one tooth to the right of the rear timing cover Mark. Also smoke test the inlet system to check for leaks.Definately sounds like an n75 valve fault. |
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1.9d, erratic idle, lack of power, loud, smoke |
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