lq4 falls on its face when under load

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Mar 13, 2015 | 11:32 AM

85jeep cj7

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lq4 falls on its face when under load

what I have is an lq4 out of a 2005 sierra that I have put into my cj7 engine seems to run good at idle, and will take fuel fine in park. When you put it in drive and take off it acts like the exhaust pipes are clamped shut at full throtle, when you let off the throtle slowly it will open up and run when not putting the motor under load. any help is great thanks in advance

Mar 13, 2015 | 11:42 AM

Bowtie316

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Check fuel pressure.

Mar 13, 2015 | 11:49 AM

85jeep cj7

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fuel pressure stays at 58 psi on the rail

Mar 13, 2015 | 11:51 AM

TurboBuick6

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MAF or MAP?

Mar 13, 2015 | 11:56 AM

85jeep cj7

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both maf an map are new, and not throwing any codes for them I am getting knock sensor codes for bank 2 but when knock sensors are unplugged it still acts the same