high idle - Pirate4x4.Com : 4x4 and Off-Road Forum

richharr · 07-26-2007, 07:16 PM

Jeep=87 2.5l 4cyl, ax5, np207, 30/35. all stock.

problem. after changing the internal slave and clutch mc, I let the jeep sit for about 3 weeks, when I turned it on after that time the idle was wicked high (2000 rpm) and stay there. I ran through a couple of tanks of gas with stabilizer thinking it might be old gas. but now it starts up and stabilizes at about 1500 and goes to 2k after you drive any distance.

new plugs, wires, dist cap,

the header/exhaust junction has a small leak because one of the hangars is broke and it shifts, so I'm thinking the o2 sensor is getting an accurate reading. any thoughts

hickengineering · 07-27-2007, 10:25 AM

Check vacume system, make sure all the lines are still conected, use starting fluid to spray around lines, see if there are any leaks. Other than that get out the timeing light and start confirming your base line paremeters of the engine, choke working properly ext.

Why J? · 07-27-2007, 11:49 AM

Your IAC motor took a dump.

07-26-2007, 07:16 PM	#1 (permalink)
richharr Registered User Join Date: Apr 2007 Member # 89243 Location: NewYorkCity Posts: 91	high idle Jeep=87 2.5l 4cyl, ax5, np207, 30/35. all stock. problem. after changing the internal slave and clutch mc, I let the jeep sit for about 3 weeks, when I turned it on after that time the idle was wicked high (2000 rpm) and stay there. I ran through a couple of tanks of gas with stabilizer thinking it might be old gas. but now it starts up and stabilizes at about 1500 and goes to 2k after you drive any distance. new plugs, wires, dist cap, the header/exhaust junction has a small leak because one of the hangars is broke and it shifts, so I'm thinking the o2 sensor is getting an accurate reading. any thoughts

07-27-2007, 10:25 AM	#2 (permalink)
hickengineering Registered User Join Date: Nov 2006 Member # 81896 Location: Buena Vista, CO Posts: 160	Check vacume system, make sure all the lines are still conected, use starting fluid to spray around lines, see if there are any leaks. Other than that get out the timeing light and start confirming your base line paremeters of the engine, choke working properly ext. __________________ 72 CJ5, TBI injection, 4.56 locked D44 front, toy 8" rear, T18. SOA, 35's. Tow Rig: 2006 Cummins, G56, AFE stage 2, 4" Magna Flow, II dragon flow 60 hp injectors.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

07-27-2007, 11:49 AM	#3 (permalink)
Why J? Registered User Join Date: Apr 2006 Member # 71834 Location: Knoxville, TN. Posts: 203	Your IAC motor took a dump.