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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Ignition Module and other thoughtsViews : 1829 Replies : 42Users Viewing This Thread : |
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Jun 8th, 2018, 13:09 | #11 | |
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It actually starts playing up when it gets warm though. it will idle fine when cold (imagine a choke is on!) then when it starts warming up, is when the problems start but i'll deffo try the meths thing first!
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. |
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Jun 8th, 2018, 13:40 | #12 | |
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https://www.toolstation.com/shop/Pai...+Spirit/p99550 Most places charge about £3.50 for 500ml so it's half price by comparison.
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
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Jun 17th, 2018, 16:00 | #13 |
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Slight update, I added some meths and started it up, but it still stalled.
I still have the new parts from when i was last fault finding and it occoured to me that since the starting problems were cured by a new dizzy cap / rotor arm, i might as well fit the new MAF that was in the boot just to see if that makes a difference and i'm pleased to say that the car now doesn't cut out. it will start from cold, idle around 1,000rpm but then as it warms up, the idle starts to drop and you can see the needle just fluttering about, just fluctuating slightly. Now i do know on this car i have a few manifold gaskets that have blown out. I'm hoping this accounts for the tappety noise i get when reving the car, and as the revs come back down again but nowhere seems to want to replace these manifold gaskets (i guess the manifold is a pain to get off?!) Anyway i digress. I had the car idling for a long time (much longer than when it was cutting out!) so i think thats one problem solved. The idle however, is still low. and when hot starting the car again, it idled around 500rpm (didnt stall, but idle is too low) and the needle stutters very slightly. I'm guessing next step is to clean the Idle control valve / throttle body? Ive read about removing the idle control valve and it looks simple enough. I'll also check my hoses for any leaks or splits. Anything else i should be checking? Many THanks
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. |
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Jun 17th, 2018, 16:09 | #14 |
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The meths will carry on working to get rid of any condensation in the tank James but from what you've described, cleaning the ICV would be a good idea. COsts very little to do and might well bring about a good result.
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
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Jun 17th, 2018, 16:44 | #15 |
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Thanks Dave. I've just removed it from the car. Not sure what I'm looking at or for but is there any particular method of cleaning it or do I just soak it in throttle body cleaner and just generally make it sparkle again?
Is there any way of testing it's operation now it's off the car? Or shall I just clean it and put it back on and see what gives? Thanks James
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. |
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Jun 17th, 2018, 17:18 | #16 |
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Just been watching a few YouTube videos and one guy shook his ICV and it made a fairly decent house but when he cleaned it, it rattled even more freely. I tried this with mine and there was a very faint but very poor slight rattle. I guess this is by no means conclusive but probably confirms the need for a good clean?
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. |
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Jun 17th, 2018, 18:04 | #17 |
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I wouldn't say it's conclusive James but could well be a symptom. Usually i've just sprayed carb and air intake cleaner into the valve and let it soak. Not having had a B230 with one on and on the B280E it's above the manifold/throttle body, i've just disconnected the inlet hose from it, given it a good squirt, cleaned a few other bits like the stubs on the inlet manifold for the various vacuum connections etc, started the car and then given it another squirt while running.
Also cleaned the throttle body in a similar way but that's the useful thing about the cars i've owned, they've always been easy access for things like that.
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
Jun 17th, 2018, 18:17 | #18 | |
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Jun 18th, 2018, 14:37 | #19 |
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Right thanks to the very good guide on here, I have removed he throttle body (see attached pictures!) Fair to say it needs cleaning. Existing gasket looks fine to reuse as I was gentle pulling the throttle body off. The only problem I had was when getting the two intake hoses off on the top of the throttle body. I undid the clips and the hoses wouldn't budge so I pulled them a little and they snapped! As you can see in the pictures, the intake hose is literally welded itself to the throttle body. I'm wondering if I'll have enough length of hose left to get this welded hose off the throttle body and use the existing length of hose to reattach.
Off to halfords to buy some Wynn's throttle body cleaner bow!
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. Last edited by James_N; Jun 18th, 2018 at 14:41. |
Jun 18th, 2018, 14:40 | #20 |
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photos as they wouldnt upload:
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1997 Volvo 940 LPT Celebration. 187,700 miles, manual. |
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