Alright so out of nowhere my MAP sensor started acting up on me today, i started the car, put it in reverse then when i put a load on the motor it chugged and tried to die. I started it up, revved it up a couple times and it was fine all day. I drove out to tempe earlier which is maybe like 12 miles from my place and when i hit the off ramp my car just goes nuts. Starts bogging tryin to die etc, To get it thru the intersection i had to ride my clutch like crazy then the power came back and it ran fine....for like 50 ft.

I knew what the symptoms were because ive already encountered a map sensor issue and this is a replaced one on the car now. The last time i figured it was age that killed it finally but im afraid my car is eating sensors....


Then i toyed with the sensor a bit and checked all the connection which turned out to be fine. Started it up and it was ok, then it bogged again, i looked over at my TBI for some unknown reason and noticed on of my injectors had a loose connector because the tabs were snapped so the injector wasnt working all the way so i had to push it back down snug.

I dont think thats related to my MAP code it spit out, i got a code 34 and 44 which are MAP issue and then lean O2, but on the other hand after i messed with the injector the car ran great and it was like when i drove there. My only issue with thinking its just the injector is why would my vaccum reading change that much from a loose injector?

So is my car frying MAP sensors? All connections are tight, and i hammered on my motor on the way back to make sure it wasnt a fluke lol

 

This is a classic example of the limitations of the programming in these ECM's, potentially misleading an uneducated individual.
When an injector is not firing you have to step more on the gas to make the engine run, thereby lowering the vacuum. The ECM doesn't check the current draw of the injectors so it wouldn't know if one is out, (neither does it know the state of the spark). It does measure - & expect - a certain relationship between the trottle position, the RPM's, & the vacuum, but it really can't tell for certain which one is out - if any at all. The software could just as well have decided that the TPS was way high, or even that the O2 sensor was faulty.
It seems explainable to me, I think you can forget about the gremlins for the time being.

 

moral of the story is my injector was at fault?

 

The way I interpret the happenings, yes.
The ECM doesn't have much in the way of tools to determine problems so it has to make some assumptions and that leaves all the more in the hands of the mechanic that has to understand not only the workings of the engine but also the ECM and it's sensors.
Hehe, I just realized maybe it's like understanding women, you have to look at the hidden meaning behind what they say, not just their exact words..

 

well if you wanna get technical its like a hit or miss trying to figure out what it really means (women and obd1) lol