1996 GMC Sierra flooding

LABBY2698

MEMBER
1996 GMC SIERRA

Engine Mechanical problem
1996 GMC Sierra V8 Four Wheel Drive Automatic

starts fine after sitting for 6 hours but any sooner it will act like it wants to flood out, if I hold the foot feed down it will start. I had a buddy hook up a code reader to it and it came up with a temp code saying its not hot enough. My temp gauge shows 180. Would this also cause my torque converter to not lock up? That started happening at the same time.

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Hi labby2698, Welcome to 2carpros and TY for the donation

Check and test the coolant temperature sensor-acting like its flooding out could be injectors and fuel pressure regualtor leaking, to inlcude excessive fuel pressure due to clogged return line.

BTW some manufacturers use the coolant temperature sensor to control the overdrive operation of the transmission.

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Friday, March 19th, 2010 AT 11:14 PM

LABBY2698

MEMBER
2 POSTS

Has a new updated spider and the fuel pressure is 58lbs. And doesnt leakdown for about 30 min, is there 2 sesors for the coolant? 1 for the gauge and 1 for the ecm?

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Saturday, March 20th, 2010 AT 12:01 AM

RASMATAZ

MECHANIC
75,992 POSTS

Yes sir

The coolant temperature sensor is located on top right front of engine near thermostat housing

and the coolant temperature sending gauge/switch on front of left cylinder head. Sorry no pic available

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Saturday, March 20th, 2010 AT 12:12 AM