DieselTalk

DieselEngineTrader's FREE Diesel Engine Forums

new topic search Categories login View Detroit Engines

CATEGORY LISTINGS > DETROIT > cold idle speed too high [ REFRESH ]
Thread Title:

cold idle speed too high


Created On Wednesday June 06, 2018 06:00 Diesel Talk
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 387
Joined: Dec 2007

Note Wednesday June 06, 2018 06:00 View thread in raw text format
Diesel Talk
My truck now needs to fully warm up before the idle speed to come down properly. Something has changed. Any suggestions?

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 387
Joined: Dec 2007

Note Wednesday June 06, 2018 07:31 View thread in raw text format
Diesel Talk
I recently had the intake manifold off to install a gear case bracket. I'm wondering if the air temperature sensor is bad. Or would it need to be re-calibrated if it is unplugged?

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 387
Joined: Dec 2007

Note Wednesday June 06, 2018 11:14 View thread in raw text format
Diesel Talk
I'm thinking oil temperature sensor. Maybe I knocked it when working with the intake manifold. I'll check it when it cools down. Hard to see in this Volvo without taking the doghouse off.

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

egantrucking
Diesel Talk Forum
Posts: 387
Joined: Dec 2007

Note Saturday June 09, 2018 10:06 View thread in raw text format
Diesel Talk
It was the oil temperature sensor. I could not find any bad wiring so I bought a new oil temperature sensor($50 from Detroit) and tested the resistance with an ohm meter. It was significantly different than the old sensor. I also tested it against the fuel temperature sensor since it is the same part number and that also confirmed that the old oil temperature sensor was bad. I replaced the sensor and now the idle comes down properly when the engine is warmed-up. Looks like it is fixed.

The oil temperature sensor is located on the back(drivers side) left hand side of the engine bellow the intake manifold. The block is cast with the word "OIL" next to the sensor hole.

-------------------------
michael egan
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
CATEGORY LISTINGS > DETROIT [ REFRESH ]
Young & Sons Inc.
Young & Sons Inc.
Young & Sons Inc.
Big Bear Engine Company
Luoyang Diron Parts Trading Co.,Ltd
Diesel Sales
Advertize on Diesel Engine Trader

Customer Testimonials

Newsletter

Subscribe to our mailing list to get all the latest DET news.as well as daily or weekly notifications of new engines and spare parts listings.

'We sold a Turbo in 2 weeks to a guy in Houston! We also sold the first engine we listed - an old Hatz. It took 2 months to sell but that was OK as we couldn't move it locally. We track visitors to our website and we get lots from DieselEngineTrader.com. Your website really works, it's a great service and we'll be using DieselEngineTrader.com for years to come!'

Brad Marcak, Powerpro Texas, USA

'DieselEngineTrader gives us the opportunity to broaden our sales coverage at very reasonable cost. We sold an International 7.3 to Florida for an advertising cost of only $15.00'

Horace Weaver, Tri-County Diesel Marine, Bellingham, WA

'I had a Cummins ISX600 sitting in my shop for 2 years and finally managed to sell it through DieselEngineTrader.com! Great service and I like the way that the Buyer was able to phone me directly.'

David G Bouchard, Los Angeles, USA