scuba

Needless to say, my junk has lots of problems. :lmao:

Truck is a 99 2.7 5-speed 4x4.

It started out yesterday when as I was taking off from a stoplight the truck stumbled and wouldn't get out of its own way. Felt almost like I was running out of gas.
I was right next to a gas station so I pulled in and filled up. It only took 12 gallons and I have a 16 gallon tank. WTH right?
Well I go to start her back up and BAM, it starts, and dies out shortly. Got the code reader out, saw a P0441. So I started looking at evap lines for cracks or something, nothing.
I found out the coupler from my intake tube to the throttle body was completely cracked. Replaced that, same starting and dying out.

Got it towed home.
Started checking vacuum lines and everything, couldn't find anything that looked bad.
I cleaned the MAF just cause, hooked back up the power steering air control valve (its just vacuum lines that basically loop) cause I had it unplugged, still starting and dying out.

Today when I got home from work I checked the code reader again and got P0100, P0110, P0115, P0120.
I've checked some wiring, and done a couple small tests with the volt meter, checked fuses, swapped relays into the EFI slot, nothing. Still not doing anything. I cracked open the fuel line where there is a fitting just after the fuel filter, I'm getting some fuel spraying out of it, so I have fuel.

I'm not sure where to go from here. Has anyone dealt with any of these codes or a combo of any of them?
I need some guidance.

Thanks in advance.

vital22re

iTrader: (2)

Fuel, spark, compression. just because you have fuel to the rail doesn't mean its spraying into the motor.

Pull a plug and check for spark. Grab some starting fluid and give it a spritz and see if it chugs.

Did you disconnect the maf while the key was on? or maybe forget to plug it back in. The p0100,p0110
say maf.
p0115 Is coolant temp sensor for ecu I believe
p0120 is something with tps.

scuba

I'm an idiot. I never looked at this page:
http://ncttora.com/fsm/2003/Repair_M.../mafm/insp.pdf
I just ohm'd out the MAF, no resistance through the terminals mentioned on the above page. It must be dead. Oh well. I'll get a new one in shortly.


FWIW, I was looking at pages like this in my paperback FSM.
http://ncttora.com/fsm/2003/Repair_M...e/cip01001.pdf



Damn thing is starting to show her age at 190K.
Needs a new trans too.

scuba

New MAF didn't change anything.
Still getting all four of the following codes: P0100, P0110, P0115, P0120.

Anyone seen these all before?

scuba

Checked for resistance between all 4 sensors using the common wire that E2 shares. Same small readings everywhere (.003 ish). Then tested between the 4 sensors and the connector that goes into the ECM, same .003 ish.
Pulled the ECM, getting bad readings from the diode immediately on the other side of the the E2 circuit.

Bad diode is at the bottom, kinda redish.