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Hi, thanks for posting
Does the check engine light stay on while the engine is running?
Does it idle normally, no misfires, no other issues besides the lack of power at about 2800 rpm?
Thanks for the reply
It should have a manifold absolute pressure sensor(MAP sensor) mounted on the firewall, it has a single vacuum line connected at the bottom and an electrical connector on it, check to make sure the vacuum hose is not cracked, be sure the wires to the connector are not broken or loose, try another map sensor, without a check engine light on and by what you have already replaced it's my best guess right now.
When it's cold the air fuel ratio is on the rich side, when it reaches operating temp the computer leans it out.
It ould be the map sensor, the computer adjusts the mixture based on inputs from it. Another thing that I can think of may be the coolant temperature sensor, if it's out of specs it can send the wrong temperature information to the computer, most sensor malfunctions turn the check engine light on, is the light even turning on when the key is on?
Ok, if it can read live Map date in gm/sec let me know what the results are at idle and at about 2500 rpm.
Short and long tem fuel trim readings would also help,
Thanks, ***** *****'t see a problem there.
Do you happen to have a vacuum gauge or can you get one? I'm kind of curious what intake manifold vacuum is at idle and higher rpm.
Thanks for the reply, give the map sensor a try and let me know how it went, I'm going to be on a trip today so I won't be able to get back to you for a few hours.
Hello, just following up since my last reply, did the sensor solve the problem?