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Engine Specific Info and Questions => IDI Engine => Topic started by: ricosuave on October 18, 2004, 05:39:15 pm

Title: does this sound strange to anyone?
Post by: ricosuave on October 18, 2004, 05:39:15 pm

What happened in this post:

http://vwdiesel.net/phpBB/viewtopic.php?t=528

Now, my car tends to idle faster.  What normally would be a cold idle w/out handle @ ~900 is now ~950.  What normally would be a cold idle w/handle @ ~1000 is now ~1050.  And my normal warm-engine idle was ~1000, is now 1050, sometimes 1100.

Any ideas?

Title: does this sound strange to anyone?
Post by: Hammy on October 18, 2004, 06:35:54 pm

Rico;
 You didn't by chance happen to change the alternator belt recently. If the belt was thinner and fit  deeper into the pulley, it would read at a higher rpm. Vice-versa, if the belt was wider, it would rider further out from the center spinning the alternater slower. I realise that you just had your fuel tank flushed out , due to the gasoline fill up, but I would hate to see you chasing ghosts. I recently had this problem concerning my belt. That is why I mention it. Reading what happenned with the fuel issue, personally I wouldn't be that worried. Seeing as you never ran the engine on the gasoline at all, I really don't see how any of it would get into the fuel filter(let alone the engine) unless it wasn't all drained out. Also, I wouldn't be surprised if your owners manual mentions running some gasoline during the (cold) winter months, to prevent fuel gelling. Best of luck!

Title: does this sound strange to anyone?
Post by: Hammy on October 18, 2004, 06:38:49 pm

Rico;
 Where do you reside?

Title: does this sound strange to anyone?
Post by: QuickTD on October 18, 2004, 07:02:34 pm

Has the weather turned cold where you are? The cold tends to increase fuel density. Increased fuel density leads to a slighly greater injected quantity and a slightly higher cold idle.

Title: does this sound strange to anyone?
Post by: ricosuave on October 18, 2004, 08:37:18 pm

hi all,

thanks for the tips.

no, i havent replaced the alt belt, although I do have to soon.

and quick, yes it has turned cold here in calgary, probably for the first time since last spring.

i guess i'm being paranoid about the 'gas' thing.

rico

Title: does this sound strange to anyone?
Post by: gldgti on October 20, 2004, 11:10:26 pm

ive heard stories about truck racers putting lots of petrol (gasoline) in their diesel to clean out fuel system, up to the point where revving the engine results in a long plume of flames shooting from the exhaust pipe...

wouldnt reccommend it though  :wink: