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914World.com _ 914World Garage _ idel to high can't lower it
Posted by: Tman914 May 29 2010, 05:27 PM
914 2.0 liter 1974 D-jet
After driveing it a around town today noties the RPM's got to high its ideling at 1500 rpm's sitting at stop light, engine temp is half way at the gauge .check linkage at the throttle valve & retrun spring and its doing it job sitting nice but couldn't lower it at the idel screw what the hell 
Posted by: rjames May 29 2010, 05:30 PM
Vacuum leak?
Posted by: dr914@autoatlanta.com May 29 2010, 05:30 PM
914 2.0 liter 1974 D-jet
After driveing it a around town today noties the RPM's got to high its ideling at 1500 rpm's sitting at stop light, engine temp is half way at the gauge .check linkage at the throttle valve & retrun spring and its doing it job sitting nice but couldn't lower it at the idel screw what the hell
vacuum leak. Aux air valve is not closing or decel valve is sticking. Maybe also the vacuum unit is not retarding the timing.
Posted by: Tman914 May 29 2010, 05:31 PM
ok I will look into that thanks
Posted by: vsg914 May 29 2010, 06:37 PM
Hey Tman, Is that your boxer? Whats the shirt say?
Look for the small hose off on the decel valve. If the end is frayed, cut it off to expose new hose that will stay on better.
Posted by: detoxcowboy May 29 2010, 06:49 PM
idle trouble shooting.. with your exact problem in the list of stability issues, wonderfull piece of info..
http://members.rennlist.com/pbanders/idle.htm
Posted by: Tman914 May 30 2010, 10:38 PM
Hey Tman, Is that your boxer? Whats the shirt say?
Look for the small hose off on the decel valve. If the end is frayed, cut it off to expose new hose that will stay on better.
Ya he has pass away a few years ago and i put my work shirt on him and took this pic
its say Toyota Material Handling on it lololo
all Vacuum hose's are new
Posted by: Tman914 May 30 2010, 11:01 PM
ok thanks cowboy i will check it tomorrow thanks to all for your help
Posted by: rwilner May 31 2010, 06:48 PM
just a thought...it could also be your TPS. If you're not getting to the idle setting on the tps, the idle adjustment setting on the ECU won't have any effect.
One check for the TPS: With the key turned to accessory, slowly press the accelerator to the floor...you should hear exactly 20 clicks.
(for the record, got that from George's tech tips 700 book.)
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