- Dec 25, 2012
- 49
Hey guys. A few issues I'm starting to have in my 2002 TB 4.2L, 175K miles.
Issues
1. Engine temp reaches 3/4 mark sometimes in 95+ degree SoCal weather. AC is on.
2. Cooling fan clutch fully engages when in issue #1. Turn off AC, and the fan gradually disengages.
- If the fan was engaged before engine off - it will remain engaged until after I turn AC off at engine restart
3. Sometimes I get a pending code of P0172, when I get this, the engine idles at 900rpm
- idle goes back to normal after engine shut off and cool
- when 900rpm idle, while coming to a fast stop, the RPM drops below 500 and is close to stalling but does not. RPM's
- Usually happens when temps are hot
- will hunt for idle and will almost always settle at 900rpm when in this condition.
Changes/Upgrades/Maintenance in the last 40K miles
1. Spark Plugs
2. Valve cover, intake, and spark plug gaskets
3. Clean TB and air filter
4. ACD thermostat w/housing
5. Fan clutch
6. Water pump
7. Coolant flush w/50/50 Dexcool
8. Diff fluids
9. Fuel filter
10. Charcoal canister
11. Purge Valve
12. Vent Valve
13. Oil change done at 173k
14. Fuel cap
15. New ACD Radiator
16. CV shafts
17. New fuel pressure regulator and FPR vacuum hose
18. ACD coil packs
19. New o2 sensor
20. Cabin air filter
*All parts are ACD or GM. For some parts, Delphi was used.
Other
No check engine lights or reduced power. Only pending P0172 when in issue 1 and/or 2.
Need your help because I want to avoid buying/leasing a newer truck. I hate payments. Thanks!
Issues
1. Engine temp reaches 3/4 mark sometimes in 95+ degree SoCal weather. AC is on.
2. Cooling fan clutch fully engages when in issue #1. Turn off AC, and the fan gradually disengages.
- If the fan was engaged before engine off - it will remain engaged until after I turn AC off at engine restart
3. Sometimes I get a pending code of P0172, when I get this, the engine idles at 900rpm
- idle goes back to normal after engine shut off and cool
- when 900rpm idle, while coming to a fast stop, the RPM drops below 500 and is close to stalling but does not. RPM's
- Usually happens when temps are hot
- will hunt for idle and will almost always settle at 900rpm when in this condition.
Changes/Upgrades/Maintenance in the last 40K miles
1. Spark Plugs
2. Valve cover, intake, and spark plug gaskets
3. Clean TB and air filter
4. ACD thermostat w/housing
5. Fan clutch
6. Water pump
7. Coolant flush w/50/50 Dexcool
8. Diff fluids
9. Fuel filter
10. Charcoal canister
11. Purge Valve
12. Vent Valve
13. Oil change done at 173k
14. Fuel cap
15. New ACD Radiator
16. CV shafts
17. New fuel pressure regulator and FPR vacuum hose
18. ACD coil packs
19. New o2 sensor
20. Cabin air filter
*All parts are ACD or GM. For some parts, Delphi was used.
Other
No check engine lights or reduced power. Only pending P0172 when in issue 1 and/or 2.
Need your help because I want to avoid buying/leasing a newer truck. I hate payments. Thanks!