Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Can you check your fuel pressure on the road?
Sounds like a dying fuel pump.
A gauge taped to your windshield will show if the pressure is low on the road.
Which is disconnected on the map sensor?
The vacuum source or the electrical connector?
That is interesting.
Do you have a scan tool that can monitor engine data?
You have answered my next question about the hose, you must be a mindreader.
Can you borrow a scan tool?
Always better to look at engine data.
You are really guessing without seeing what the ECM sees.
There is lot of scan tools around now.
A GM scan tool would be best, ***** ***** of a lot of generic tools that can show multiple ecm data would be good.
Do you need any further help?
I hope my advice has been of assistance to you.