mitsu Posted September 6, 2009 Share Posted September 6, 2009 i noticed on my 90 pathy SE when it is idling it is idling rough, and when you touch the accel. pedal the missing would get worse and the ECU green light would blink on and off. When drivin on the road the van would run really rich as the accelation would be very slow and there tends to be a lack of power. The only time when this lack of pwer disappear is when driving late at night when the temperture is very cool. An help on what could cause this would be appreciated Link to comment Share on other sites More sharing options...
Tungsten Posted September 6, 2009 Share Posted September 6, 2009 probably MAF wiggle the wires Link to comment Share on other sites More sharing options...
Indigent Posted September 6, 2009 Share Posted September 6, 2009 The green light flashing indicates that the O2 sensor is going into closed loop mode. Read the info about the Mode 1 check in the FSM. It tells you all about it. If the engine is stumbling like you say, then I would say MAF as Tungsten suggested or O2 sensor. Link to comment Share on other sites More sharing options...
mitsu Posted September 7, 2009 Author Share Posted September 7, 2009 The green light flashing indicates that the O2 sensor is going into closed loop mode. Read the info about the Mode 1 check in the FSM. It tells you all about it. If the engine is stumbling like you say, then I would say MAF as Tungsten suggested or O2 sensor. oh ok thanks for the advice, i wiggled around the MAF wire and didnt notice any difference i started to wiggle the idle sensor tats the one near to the firewall on the left side and i noticed the rev getting smooth but it was idling high, does that mean the sensor is faulty Link to comment Share on other sites More sharing options...
Indigent Posted September 8, 2009 Share Posted September 8, 2009 (edited) If you are talking about the Idle Air Control Valve solenoid, it isn't a sensor. It should go to a connector in the stack of wires by the oil fill port. It is the only one with 2 wires. I think they are orange and black. Take a multimeter and measure the resistance across those two wires. It should read ~10ohms. If it doesn't, then that solenoid is bad, or the wires to it. Edited September 8, 2009 by Indigent Link to comment Share on other sites More sharing options...
mitsu Posted September 9, 2009 Author Share Posted September 9, 2009 i did some tests on the ECM, in the mode to check the O2 sensor the sensor is working ok, the throttle position sensor is working fine and when i checked the air fuel mixture it is running lean, but i know tat my intake hose has crystallized rite after the MAF but i taped it over as the hose is very hard to find in Jamaica so will that cause the misfire and lean mixture. When i was testing the mixture u have to have the rev over 2000rpm it was missing like crazy and alot of blue smoke was coming off the exhaust. so would tat mean its running lean or rich Link to comment Share on other sites More sharing options...
Formerly_94PathyMan Posted September 10, 2009 Share Posted September 10, 2009 blue smoke typically means oil, but I have seen it being a bad mixture also, but I would start by watching your oil consumption, but for the idle area, I would say check cap, rotor, wires, plugs, then move the IAC solenoid, TPS, MAF, or fuel filter sometimes does that crap to the idle, but if you are missing like crazy revving and you got blue smoke, I am guessing somewhere you might have some oil getting into the chamber, but I could be wrong, lets hope so! Link to comment Share on other sites More sharing options...
mitsu Posted September 10, 2009 Author Share Posted September 10, 2009 blue smoke typically means oil, but I have seen it being a bad mixture also, but I would start by watching your oil consumption, but for the idle area, I would say check cap, rotor, wires, plugs, then move the IAC solenoid, TPS, MAF, or fuel filter sometimes does that crap to the idle, but if you are missing like crazy revving and you got blue smoke, I am guessing somewhere you might have some oil getting into the chamber, but I could be wrong, lets hope so! Well I know in terms of the oil consumption I have to top up a qrt of oil like every week or so. I know the tps and idle sensor is working and I think the o2 should be working Link to comment Share on other sites More sharing options...
Precise1 Posted September 10, 2009 Share Posted September 10, 2009 Sounds like you have a valve guide/body or piston ring problem. A quart of oil a week is a lot!!!! It sounds like someone needs to look at the top end. Can you do a compression test?? B Link to comment Share on other sites More sharing options...
mitsu Posted September 10, 2009 Author Share Posted September 10, 2009 Sounds like you have a valve guide/body or piston ring problem. A quart of oil a week is a lot!!!! It sounds like someone needs to look at the top end. Can you do a compression test?? B i can do the test but i dont have the tools to do it and its expensive to do it a garage worse the dealer. I wanted to re service again and see wat happen caus normally it starts to burn the oil when it wants to be serviced, and i wanted to change the plugs and the fuel filter Link to comment Share on other sites More sharing options...
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