Idle Problem
Thread Starter
|
New User
Joined: Oct 2017
Posts: 1
Likes: 0
Idle Problem
I have a 93 4x4 4.0 ranger and I need help.
0
It idles rough and dies. I can't put it into gear without it dying, but if I push on the accelerator it will stay running and seems to run great when revved up. When I unplug the TPS sensor (New part) it idles much better, at about 700 rpm instead of 3-400, but just a little rough still. If I push on the accelerator with the sensor unplugged it wants to die. I blew cigar smoke into the vacuum system and there are no leaks after the MAF. The temperature gauge on the dash moves a little when you turn the key, but never goes above the C even though I can feel the hoses are hot. is not working, The valve cover is leaking some oil onto the exhaust manifold, and the coolant is low. I'm completely stumped so I just listed everything I know is wrong with it, relevant or not. I'm starting to think a problem with the throttle body or intake manifold. I replaced the Spark plugs, Fuel filler hose, fuel pump, pressure regulator, PCV valve, TPS, IAC, and MAF.
Codes engine off key on
159 out of self test range
327 EGR circuit below minimum voltage
341 Octane adjust service pin open
565 Canister purge circuit failure
558 EGR vacuum regulator circuit failure.
Codes with engine on.
157 Mass Air Flow Sensor Below Minimum Voltage
998 Hard Fault Present.
0
It idles rough and dies. I can't put it into gear without it dying, but if I push on the accelerator it will stay running and seems to run great when revved up. When I unplug the TPS sensor (New part) it idles much better, at about 700 rpm instead of 3-400, but just a little rough still. If I push on the accelerator with the sensor unplugged it wants to die. I blew cigar smoke into the vacuum system and there are no leaks after the MAF. The temperature gauge on the dash moves a little when you turn the key, but never goes above the C even though I can feel the hoses are hot. is not working, The valve cover is leaking some oil onto the exhaust manifold, and the coolant is low. I'm completely stumped so I just listed everything I know is wrong with it, relevant or not. I'm starting to think a problem with the throttle body or intake manifold. I replaced the Spark plugs, Fuel filler hose, fuel pump, pressure regulator, PCV valve, TPS, IAC, and MAF.
Codes engine off key on
159 out of self test range
327 EGR circuit below minimum voltage
341 Octane adjust service pin open
565 Canister purge circuit failure
558 EGR vacuum regulator circuit failure.
Codes with engine on.
157 Mass Air Flow Sensor Below Minimum Voltage
998 Hard Fault Present.
Thread
Thread Starter
Forum
Replies
Last Post
neal2ross
1987 - 1996 F150 & Larger F-Series Trucks
16
Apr 6, 2016 08:11 PM
hawkco66
1987 - 1996 F150 & Larger F-Series Trucks
7
Feb 3, 2008 05:36 PM
