Engine codes, P1131,P1151

[BOB4254]

Hi I have a 1998 ford Expedition 5.4L. 6 months ago replaced plugs, new coils, cleaned & tested fuel injectors, new throttle position sensor, cleaned MAP sensor, Cleaned throttle body, new air filter, new fuel filter, new fuel pump. Was running like new perfect. Recently Normal lite acceleration shifts 1-2-3-4 perfectly and smooth. At 45 mph press gas pedal a little more she goes into passing gear. Recent Issue: When at approx 45mph and press gas pedal to the floor to go into passing gear, engine bogs down & stays at 2000 rpm. OR When accelerating from zero, and press gas pedal to the floor engine bogs down.Cleared the computer and drove. Within 10 miles I now get Engine codes, P1131,P1151 / P0171,P0174 / P0136 (P2270, P2271) / P0156 (2272, 2273). Not sure what to do at this point. Any advice on a fix would be appreciated.

 

[Killer Ride]

Sounds like you have an air or vaccum leak. Check PcV and intake manifold or could be a bad Or faulty MAF

Sent from my SM-G950U using Tapatalk

 

[Hamfisted]

Get yourself a smoke tester and test your intake system. It'll show you where all your vacuum leaks are in about 15 seconds and save you days of work. Everybody that works on their own vehicles should have one ( as well as an air compressor....).


https://www.amazon.com/AutoLine-Pro...&qid=1623631243&sprefix=smoke+,aps,187&sr=8-9

 

[BOB4254]

Finding smoke testers on ebay...... do you think these would do the same job? Thanks....

https://www.ebay.com/itm/2823390706...1291&msclkid=295267131a091ea6a84707d5b5356d50

 

[Yupster Dog]

Finding smoke testers on ebay...... do you think these would do the same job? Thanks....

If it's money you are trying to save you can make one. Youtube search "make smoke machine" and you will find a lot of videos on how to make one.

 

[BOB4254]

Thanks for the tip....!