 Low idle at operating temp |
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| moneysmarts |
 Jun 9 2004, 05:33 PM
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#1
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Member  Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None 
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74 2.0. When I get up to operating temperature, the idle drops down below 1K and frequently stalls.
I need to backed out the adjustment screw, nearly all the way (until it starts to hiss at a really loud pitch) in order to get the idle up to 900-1000. This can't be the solution. Any ideas? Thanks in advance. |
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| newdeal2 |
Jun 9 2004, 05:56 PM
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#2
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Unregistered |
Have you checked the timing?
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| moneysmarts |
Jun 9 2004, 06:36 PM
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#3
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None
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No, not yet.
I runs perfecly throughout the full RPM range in all gears, so I didn't think I should mess with it. It just slows down at rest and stalls unless you blip it. |
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| Jeffs9146 |
Jun 9 2004, 06:40 PM
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#4
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Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
1. Head Temp Sensor?
2. Valve Adjustment? Jeff |
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| bondo |
Jun 9 2004, 07:01 PM
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#5
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Overheating?
--Royce |
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| moneysmarts |
Jun 9 2004, 08:36 PM
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#6
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None
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Temp guage is well out of the red.
Don't know how I'd cure overheating, anyway. Do you have something in mind? Oil is fresh and clean. No leaves or crap in the compartment. Engine compartment rubber is in good condition. |
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| Brad Roberts |
Jun 9 2004, 08:55 PM
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#7
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Is the decel valve still in place ?
99% of the 2.0's hiss at idle when they are tuned properly. B |
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| Bleyseng |
Jun 9 2004, 09:02 PM
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#8
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
If you need to back out the idle air bypass screw nearly all the way, the timing is off. It has to be set correctly at 27 degrees BTDC @3500 rpms with hoses off.
Setting a good idle is: Valves adjusted timing adjusted hoses installed correctly adjust air bypass and ECU when the motor is hot. Geoff |
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| r_towle |
Jun 9 2004, 09:08 PM
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#9
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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QUOTE(Bleyseng @ Jun 9 2004, 07:02 PM) If you need to back out the idle air bypass screw nearly all the way, the timing is off. It has to be set correctly at 27 degrees BTDC @3500 rpms with hoses off. Setting a good idle is: Valves adjusted timing adjusted hoses installed correctly adjust air bypass and ECU when the motor is hot. Geoff Setting a good idle is: Valves adjusted DWELL ANGLE SET/CHECKED timing adjusted hoses installed correctly adjust air bypass and ECU when the motor is hot. I agree, time for a tune up. |
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| pbanders |
Jun 9 2004, 09:12 PM
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#10
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Senior Member Group: Members Posts: 939 Joined: 11-June 03 From: Phoenix, AZ Member No.: 805 |
Check the idle troubleshooting link on my web page.
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| bondo |
Jun 9 2004, 09:19 PM
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#11
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
I just thought of another possibility.. could be a bad or out of adjustment throttle body switch. (It has to make the right connection in order for the knob on the ecu to do anything) If the knob on the ecu has an effect on idle, then that isn't the problem.
--Royce |
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| moneysmarts |
Jun 9 2004, 09:36 PM
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#12
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None
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OK.
Tune-up it is then. Thanks guys. I don't have much going this weekend, anyway. I'd better keep the Haynes close buy. And access to the web site! |
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