RB-GTE Posted September 19, 2012 Share Posted September 19, 2012 (edited) I got my new Supra 6 weeks ago. Haven't changed oil or spark plugs yet since it appears to be fine for now. While starting the car in cold it was shake a lot and struggle to keep and iddle bouncing back between 600-700. Once the engine was warn, it would usually idle around 750-800 at most or other times around 950... Sometimes on the first or second attemt starting it was quickly drop down to 200rpm stay on for 2 seconds, and then die... and there would be a whining noise from the fuel pump for a couple seconds after this. So I decided to take off my IDLE CONTROL VALVE today (which was a little pain to do), it wasn't that dirty but I cleaned it out. So after putting it back together I fired the car back up from a cold start. It was a big improvement from what I have seen. It didn't idle perfect still a little rough from a cold start. When I fired it up it was glued shut 1000rpm idle. After it warmed up a bit it went down to around 900. After fully warming up it then dropped to around 700 range but it seemed to be idling pretty fine? but it seems low. It would go up and down between 700-1000 range it didn't keep a normal idle still. After taking it for a 2 minute drive and coming back in my driveway after cleaning ICV. I turned the car off and started it back up again. There is a constant whining noise coming from the rear fuel pump. Why is it doing this? Next week I am installing a full decat, new walbro 255lph, new denso spark plugs, new oil.... any of this stuff would possibley help eliminate the current problems? edit: if it makes a different I have a lightened aftermarket flywheel, not sure if that has anything to do with idle? I'm just really trying to get the car to idle as it should and run perfet like my other supra's have in the past. This is 1997 TT 6-speed with 113,000 KMs (70,000) miles... Edited September 19, 2012 by RB-GTE (see edit history) Quote Link to comment Share on other sites More sharing options...
Lude Posted September 19, 2012 Share Posted September 19, 2012 I dont think iv ever had a turbo car that idles perfect. Plugs may sort the idle. The whone from the fuel pump doesnt sound good so sounds lile needs replacing anyway. Vacuum leaks can effect idle a lot, i would check few of your vacuum pipes are all ok Quote Link to comment Share on other sites More sharing options...
SupraDan24 Posted September 19, 2012 Share Posted September 19, 2012 Just be aware that lightened flywheels are generally noisier than stock, they tend to rattle. My fuel pump whines as well, which pump do you have? Quote Link to comment Share on other sites More sharing options...
RB-GTE Posted September 19, 2012 Author Share Posted September 19, 2012 Just be aware that lightened flywheels are generally noisier than stock, they tend to rattle. My fuel pump whines as well, which pump do you have? Oh yes I very well know of that. My old Supra has a LWFW and it was a little noisy (rattling sound). The problem with my fuel pump is that there is a constant wine, it wasn't like this before. It happened shortly after I cleaned out my idle control valve. I assume the fuel pump is stock, the car has a few basic mods like exhaust/intercooler but thats about it. I dont think iv ever had a turbo car that idles perfect. Plugs may sort the idle. The whone from the fuel pump doesnt sound good so sounds lile needs replacing anyway. Vacuum leaks can effect idle a lot, i would check few of your vacuum pipes are all ok Would a boost leak test show which vacume lines are possibley not on properly? actually I have also been having a spooling problem sometimes with my 2nd turbo, but other times it spools perfect. I may have a vacume line that not on right. Quote Link to comment Share on other sites More sharing options...
SupraDan24 Posted September 19, 2012 Share Posted September 19, 2012 I've got a Walbro fuel pump and it's always whining, I thought it was normal Quote Link to comment Share on other sites More sharing options...
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