Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..
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02-18-2009, 06:23 PM
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#1 | | 2 Wheel'd Mod
Join Date: Aug 2006 Location: Surrey
Posts: 1,362
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| Did timing belt, Bad idle
Hey,
So i changed my timing belt and am 99.99999% sure the timings are in place. (it starts fine and it doesn't feel like i lost power). It starts and idles fine when cold, but once it warms up, the idle bounces and then it stalls.(Bounces betwwen 1000-300)
Anyone have any ideas as what may be causing this problem?
PS: I drive a 88 prelude. DOHC
Thanks
Last edited by !oHenry; 02-18-2009 at 06:41 PM.
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02-18-2009, 06:36 PM
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#2 | | RS.net, helping ugly ppl have sex since 2001
Join Date: Oct 2004 Location: Burnaby
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Air bubbles? Did you burp the coolant system?
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02-18-2009, 06:39 PM
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#3 | | OWNER/C.F.O./MONEYMAN
Join Date: Mar 2001 Location: Vancouver
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is the engine a dohc or a sohc?
if its sohc, loosen the bolts that hold the distributor in place, u will notice that the holes are elongated, that is because they are used to adjust timing. with a timing gun, just advance it or retard it by tapping it ever so slightly to the right or to the left.
other than that, for rough idle, i believe the older preludes had the iac valve that affects idle when the engine is warm.
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02-18-2009, 06:39 PM
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#4 | | 2 Wheel'd Mod
Join Date: Aug 2006 Location: Surrey
Posts: 1,362
Thanked 418 Times in 100 Posts
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| Quote:
Originally Posted by Alphamale Air bubbles? Did you burp the coolant system? | No, but I didn't replace the water pump, just the timing belt and tensioner. Would it still be possible for air to get in coolant system? Quote:
Originally Posted by !SG is the engine a dohc or a sohc?
if its sohc, loosen the bolts that hold the distributor in place, u will notice that the holes are elongated, that is because they are used to adjust timing. with a timing gun, just advance it or retard it by tapping it ever so slightly to the right or to the left.
other than that, for rough idle, i believe the older preludes had the iac valve that affects idle when the engine is warm. | yeah sorry, it's DOHC. Idle Air Control Valve?
Ill write that down and check it tomorrow.
Anything else that may cause this problem?
UPDATE!!!
There is DEFINITLY a chattering noise. As well as very rough idling. Accelerates fine. Fairly responsive.
Caused by belt being off a tooth?
Last edited by !oHenry; 02-18-2009 at 08:18 PM.
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02-19-2009, 03:56 PM
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#5 | | 2 Wheel'd Mod
Join Date: Aug 2006 Location: Surrey
Posts: 1,362
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UPDATE:
Belt was off a tooth
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02-19-2009, 08:09 PM
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#6 | | RS controls my life!
Join Date: Apr 2004 Location: lower mainland
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88-91 prelude twin cams...the intake cam always moves when trying to re-install the belt. Thats if you have it all set to #1 before disassembley. You almost need 3 hands to slip the new belt on
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02-22-2009, 09:36 PM
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#7 | | 2 Wheel'd Mod
Join Date: Aug 2006 Location: Surrey
Posts: 1,362
Thanked 418 Times in 100 Posts
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| Quote:
Originally Posted by Puck Luck 88-91 prelude twin cams...the intake cam always moves when trying to re-install the belt. Thats if you have it all set to #1 before disassembley. You almost need 3 hands to slip the new belt on | Yeah, you need to lock them using drill bits. (Number 9 i believe) I also noticed the intake cam is slightly more advanced then the exhaust. Not sure if its just mine though  | |
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04-07-2009, 01:08 AM
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#8 | | Captain Happy Bubble is my Homeboy
Join Date: May 2007 Location: vancouver
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same problem with my prelude. try cleaning the TB and FITV. it could be as simple as carbon in your air system.
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