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Old 08-14-2021, 03:47 PM   #1
HTX86chevy
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engine bogs under load

have an 84c10 with 5.3/4l60e swap DBC
truck bogs down under acceleration. idles fine but will only speed up gradually and falls flat when I step on it. fuel pressure is steady at 58psi

things I have changed:
MAF
Fuel pump
fuel regulator
throttle body
fuel filter
complete wiring harness

codes that just popped up recently are:
p0107 manifold absolute pressure/ barometric pressure circuit low
p0342 camshaft position sensor A circuit low bank 1 or signal sensor
p0740 torque converter clutch circuit/open
p0753 shift solenoid A electrical
p0758 shift solenoid B electrical

what would you guys check 1st?
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Old 08-14-2021, 05:27 PM   #2
Davidf
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Re: engine bogs under load

The map sensor
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Old 08-17-2021, 09:34 AM   #3
clay68c10
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Re: engine bogs under load

I'd be looking if there is a circuit common to all those sensors.
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Old 08-18-2021, 11:06 PM   #4
lutronjim
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Re: engine bogs under load

Gm has specific instuctions on how and where the map sensor is located.
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Old 08-19-2021, 11:44 AM   #5
Custom 68
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Re: engine bogs under load

Quote:
Originally Posted by clay68c10 View Post
I'd be looking if there is a circuit common to all those sensors.
I had some issues long ago and it was tied to a blown fuse. It wasn't like a group of coil packs or anything but enough to cause similar issues. Start there with the simple stuff. or even a loose ground.
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