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1988 GMC S15 Gas in oil

Tiny
MHC92
  • MEMBER
  • 1988 GMC S15
  • 2.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 196,000 MILES
The truck has not been run in about six years, before it was parked it ran good. I brought it in the garage changed the oil, plugs, wires, fuel filter, air filter, distributor cap and rotor. I started it up and it's back firing and missing really bad, I pulled the dip stick out and it smells very badly like gas and it about a half quart over full. It wasn't that far over when I put the new oil in, can anyone help?
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Monday, January 20th, 2014 AT 8:01 AM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,742 POSTS
Pull the vacuum hose off the fuel pressure regulator and check if it's wet inside. If it is, replace the regulator and get that oil out right away.
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Monday, January 20th, 2014 AT 8:16 AM
Tiny
DOCDTC
  • MECHANIC
  • 53 POSTS
Hi,
If the first reply does not fix your concern, Check the coolant temp sender (CTS). It is located near the thermostat housing. If the ECM does not receive a reading back from the CTS, it's default programming is to -40 degrees. This will cause the symptoms you describe in very short order. Hope this is helpful, Keep me posted on what you find. Doc DTC
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Monday, January 20th, 2014 AT 10:43 AM

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