Electrial Problems need advice

[paint94979]

So for a little while now the 2 12v plug in's inside the cab have been intermittently working as in the they sometimes work... fuses have been checked and they are just fine now both will not work period. Also my MAF sensor will only read as high as 2.x volts we have swapped in a known working MAF sensor with similar results? any help would be greatly appreciated

 

[BLKLMM]

its an LLY thing JK:rofl:

 

[bullfrogjohnson]

You need to see if you have power at the back of the plugs.

For the MAF check the voltage scaling in your tune

 

[paint94979]

I meant to type my MAF will only read as high as 2lbs a minute....

 

[bullfrogjohnson]

I meant to type my MAF will only read as high as 2lbs a minute....

Have you rescaled it for the bigger intake?

 

[paint94979]

Have you rescaled it for the bigger intake?

yes it has ran a 5 to 5.5 intake for about 1 year... i did change the flex hose to fresh stuff but still the same ID.

 

[paint94979]

could really weak batteries cause weird shit like this? my batteries are so weak that my lift pump won't turn on when the truck is running?

 

[SSchmi5519]

Holy shit get new batteries for sure. You were flashing tunes with bad batteries? Big nono.

 

[paint94979]

Holy shit get new batteries for sure. You were flashing tunes with bad batteries? Big nono.

shit ya lol... ive had that ECM in an "unknown state" due to failed flashes more times than i care to remember

 

[JoshH]

could really weak batteries cause weird shit like this? my batteries are so weak that my lift pump won't turn on when the truck is running?

Is your alternator bad too?

 

[paint94979]

Is your alternator bad too?

i have not tested it... i am seeing 14.x volts on the cluster when running but with the key on the run position it reads about 10 volts? on the cluster the batteries are done for sure, they are original batteries btw

 

[JoshH]

If you have 14 volts when the engine is running, your alternator is good and your lift pump should be running.

 

[x MadMAX DIESEL]

shit ya lol... ive had that ECM in an "unknown state" due to failed flashes more times than i care to remember

Thats some scary shit the first time :baby:

 

[paint94979]

Thats some scary shit the first time :baby:

especially when it happens at the track and your only means of transportation is that truck lol

 

[paint94979]

If you have 14 volts when the engine is running, your alternator is good and your lift pump should be running.

i turned the truck off went back to start it and the pump had that low growl like its not getting enough power then it was off... its been like this for 6 months i guess now its definitely in need of new batteries