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1998 Chev 3500 CrewCab Vortec 7.4L

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Discuss 1998 Chev 3500 CrewCab Vortec 7.4L in the 4x4 Chevy/GMC Trucks forum.



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2002660grizzly
 
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Default 1998 Chev 3500 CrewCab Vortec 7.4L - 10-09-2005 , 08:33 PM






Engine sometimes floods when starting. Fuel injectors and fuel pressure
regulator have been replaced along with entire engine rebuild. Torque
converter does not lock up until 110km per hour, loaded or not. Any
suggestions on what to do?


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TheSnoMan
 
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Default Re: 1998 Chev 3500 CrewCab Vortec 7.4L - 10-09-2005 , 09:20 PM






2002660grizzly wrote:
Quote:
Engine sometimes floods when starting. Fuel injectors and fuel pressure
regulator have been replaced along with entire engine rebuild. Torque
converter does not lock up until 110km per hour, loaded or not. Any
suggestions on what to do?


Check engine temp sensor for ECM (not gage) because if it send a cold
singal to ECM it will be over eich and delay converter lockup

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2002660grizzly
 
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Default Re: 1998 Chev 3500 CrewCab Vortec 7.4L - 10-29-2005 , 11:49 AM



Changed engine coolant temp sensor and nothing changed. After truck has sat
for a few hours, it wants to flood when starting. No check engine light or
trouble codes appear on scanner. Torque converter still not locking up
when it is suppose to. Any other suggestions?



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Big Al
 
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Default Re: 1998 Chev 3500 CrewCab Vortec 7.4L - 10-29-2005 , 12:41 PM




"2002660grizzly" <dbberg (AT) telusplanet (DOT) net> wrote

Quote:
Changed engine coolant temp sensor and nothing changed. After truck has
sat
for a few hours, it wants to flood when starting. No check engine light or
trouble codes appear on scanner. Torque converter still not locking up
when it is suppose to. Any other suggestions?


Are you sure there are not two coolant sensors? I'm not "up" on 98's, but a
lot of older trucks have one sensor for the temp gage, and one for the ECM.

Al




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2002660grizzly
 
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Default Re: 1998 Chev 3500 CrewCab Vortec 7.4L - 02-12-2006 , 12:18 PM



Has anyone ever had a problem with the throttle position sensor on these
engines?If so do they just quit working or do they work intermitantly with
no trouble codes? The engine still floods when starting and seems to run
overly rich when running.I am reluctant to bring the truck into the local
garage because they are notorious for just replacing parts until they find
the problem costing alot of cash.Any suggestions would be greatly
appreciated.


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