Subject	PS have you checked the coolant thermostat>>
Posted by	ZUL8TR on October 13, 2009 at 8:22 AM
	This message has been viewed 360 times.
In Reply To	Valve Cover Oil Cap Diagnostic Test is Inconclusive posted by Zarcasm(Hfd, CT) on October 12, 2009 at 03:40 PM
Message	for correct temp control of the coolant. I had a defective thermostst that made the engine run cooler than design and had all sorts of idle and throttle response issues. I checked the coolant temp at the thermostst with an infra red gun and noted it was lower than design. I pulled it and checked it of the stove in a pot and heated the water and noted when it opened and closed. replaced it with OEM and solved issues. Also checked the coolant temp sensor and connector, Found it corroded and cleaned it and filled connector with dielectric grease. Did this with as many connectors as I could get to in engine as preventive maintenance. ZUL8TR in Orlando,FL
Follow Ups	Is the EGR valve stem supposed to leak?? - Zarcasm(Hfd, CT) 23:59:48 10/09/09 Check the EGR with vacuum since that is the signal that >>> - ZUL8TR 07:53:47 10/10/09 Actuating vacuum is not the problem - Zarcasm(Hfd, CT) 14:42:56 10/10/09 I agree if the plenum is leaking air that would effect>>> - ZUL8TR 19:27:04 10/10/09 Vacuum reading at idle is OK with EGR leaking but... - Zarcasm(Hfd, CT) 00:16:02 10/11/09 That old link for vacuum test was a deja vu for me... - ZUL8TR 08:01:48 10/11/09 I'm not buying Leaky Valve Guides yet... - Zarcasm(Hfd, CT) 09:25:51 10/11/09 OK let's hope not..................>>>>>>>>>>>>>>>. - ZUL8TR 06:28:56 10/12/09 Timing problems are a possibility but... - Zarcasm(Hfd, CT) 15:20:15 10/12/09 Speaking of fuel pressure. - canyoncarver 08:35:34 10/13/09 Internal fuel leak? Good question! - Zarcasm(Hfd, CT) 19:36:34 10/13/09 Internal fuel leak? Good question! - Zarcasm(Hfd, CT) 21:20:07 10/13/09 Valve Cover Oil Cap Diagnostic Test is Inconclusive - Zarcasm(Hfd, CT) 15:40:14 10/12/09 Wow! this is getting like an Agatha Cristy Mystery>>> - ZUL8TR 08:12:48 10/13/09 Yeah. EGR operation checks good but valve cover vacuum??? - Zarcasm(Hfd, CT) 19:31:07 10/13/09 Still strange that you do not get a reduced vacuum >>> - ZUL8TR 07:24:19 10/14/09 If you don't, it could help quite a bit if you had - canyoncarver 08:51:04 10/14/09 Tell me about it! - Zarcasm(Hfd, CT) 20:34:03 10/14/09 PS have you checked the coolant thermostat>> - ZUL8TR 08:22:42 10/13/09 Coolant Temp Sensor is good - Zarcasm(Hfd, CT) 19:03:08 10/13/09 Where do the vac lines run on the EGR? - d_flore 14:21:31 10/10/09 a vac line from the egr valve runs to the egr solenoid - ali300zx 20:54:38 10/10/09 IMHO, your EGR valve should not leak at 1 psi. - canyoncarver 19:57:51 10/12/09 I'm still not sure there's an air leak worth worrying about - Zarcasm(Hfd, CT) 22:24:11 10/12/09
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