Code 44 only when hot Drove my car today and after about 30-40 minutes, it popped up a check engine light and wanted to stall and lose all power. I finally got home and checked the code and got 44 "lean exhaust". I already replaced the fuel filter, O2 sensor and plug wires. My next guess would be the fuel pump. |
Re: Code 44 only when hot do the std tests . is there fuel in the PR hose ? have you run a fuel pressure and volume test ? how old /clean are your injectors ? have you OHMd them yet ? |
Re: Code 44 only when hot A fuel pressure test is an easy thing to do. It could also be a vacuum leak, EGR leak, exhaust leak upstream of the sensor, Air Injection divert/port valve leak, incorrect bias signal to the OČ sensor or poor connections to/from the ECM, contaminated sensor, etc. The '85 TPI system is somewhat loose in its monitoring of the OČ compared to later versions. The signal has to be pretty low to show a lean condition, something like less than 200mV for the duration of the 50-60 second timer base. |
Re: Code 44 only when hot I started to experiment, so I unplugged the maf sensor and it stopped the hesitation when hot.I ran it without it wanting to stall, so for now I have to leave the sensor unplugged. I also ohmed all The injectors and they all came back from 15.6 to 16. |
Re: Code 44 only when hot
Originally Posted by Logan Bryant
(Post 5986267)
I started to experiment, so I unplugged the maf sensor and it stopped the hesitation when hot.I ran it without it wanting to stall, so for now I have to leave the sensor unplugged. I also ohmed all The injectors and they all came back from 15.6 to 16. |
Re: Code 44 only when hot
Originally Posted by rusty vango
(Post 5986411)
well , you know what means . time to go through MAF sensor hell , tryin to find a good one . take our advice . dont waste time with amazon , auto zone, advance,. go to oreilleys and get a "rich porter " MAF sensor. part # MA-157 |
Re: Code 44 only when hot stay away from "spectra" quality is non existant. same for "A1 cardone" thing is , DO NOT buy a re man unit . make sure it is a NEW one . and yes , part #s are all across the board. and as far as its insides . dont worry , there are at least 3 diffrent designs of them . 86 to 89 are reported to take the same MAF . the key is NEW only |
Re: Code 44 only when hot |
Re: Code 44 only when hot just buy a new one for your 85 |
Re: Code 44 only when hot That's the problem. I don't know of a new one made just for an 85. |
Re: Code 44 only when hot granted, it being a one year only deal . could be a minor problem . but dont give up just yet |
Re: Code 44 only when hot Do MAF cars have a speed density backup or is it a limp mode it operates on when MAF is unplugged? I just wonder why not disable MAF codes and get an SD tune? |
Re: Code 44 only when hot yes , when you unplug the MAF it goes open loop. and as for why not go SD . you can |
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