1995 camaro loss of power and delayed shifting

[wpreston1990]

I got a 95 z28 i just recently changed out the map sensor on my car but after i changed it the engine started making a horrible whistling sound and lost a bunch of power i have trouble just going up hills. Also when im driving very slowly its changing gears fine but when i give it more gas and it hits about 3000 rpms its not wanting to change gears till i let off the gas i dont know whats going on i've had all my vacuum lines checked, my exhaust checked to see if it was stopped up and my fuel pressure checked to make sure my fuel pump is working properly i've also had my transmission checked but all of that was good i dont know what else to check could anybody help me please.

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[mrmint69]

Have you tried putting the old part back to see if that changes things? Did it start the second you drove with the new part or was it a while after?

[Injuneer]

Did you install the rubber seal on the MAP sensor?

[wpreston1990]

it started with the old part on there but not as bad as now after i put the new one on i dont have the old part

[wpreston1990]

it didnt come with the seal so i used my old seal till i got the new one from the chevy place