help with a 87 5.0

[brakeswhatbrake]

friend of mine has got a 87 GT with a EFI 5.0 in it. the car starts and runs but will shut off and sometimes it gets stuck in start mode any ideas guys

 

[mob]

Sounds like the ignition switch has gone bad. I believe there are some computer functions that are tied into the ignition switch that would make sense that it is shutting off, but the shutting off my be another issue.

 

[brakeswhatbrake]

nevermind took a quick look at his car once he got off of staff duty and found out that the dummie put on his cheap intake and didnt install his MAF back in.

second question though seems he has miss placed his MAF can you run a 93 MAF on a 87 with out any problems if so is will i need the sensor plug as well or will the one from the 87 plug into it

 

[mob]

The MAF plugs should be identical. The starter getting stuck is another issue, like I said before probably the switch or maybe a starter solenoid.

 

[oldfox]

The next time it keeps cranking over tell him before he unhooks the battery to stop it from cranking
to pull off the small wire off the solenoid and see if it stops cranking. If it stops cranking the solenoid
is good but it's picking up a 12 volt signal somehow to the "engage" thermal of the solenoid.
If it keeps cranking then I would think the solenoid would be bad. (I think)
The only way the starter can crank the engine is if it get juice from the solenoid.
Someone correct me if I'm wrong

 

[mob]

The ignition switch can cause that as well if it gets stuck in the start position, very likely suspect as well.

 

[brakeswhatbrake]

thanks guys more the input i went ahead and picked up the MAF for him car runs fine now with out dieing but when i drove it to the store, and went to turn it back on it just keep cranking so it does seen to be something in the ignition switch going to see if i can find a used one here on island for him