IDLES ROUGH SOMETIMES EVEN SURGES NEW LONG BLOCK

1993 Ford F-150

Tiny

JSRoeth

March, 9, 2012 AT 2:02 AM

Have diagnosed emission system Christian brothers says everything ok
New exhaust system
New fuel pump, selector switch, and float sending unit
Compression test both types example 150/60
New air charge temp sensor
New HEGOS sensor
New idle air control valve
I get DTC code DTC42 and DTC77 when performing KOER test with ODB1 tester
DTC42 says voltage is high

FOUND 4553 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

rasmataz

March, 9, 2012 AT 2:33 AM

DTC - 42 Ignition bypass circuit error-also go this links: http://www.2carpros.com/articles/engine-misfires-or-runs-rough

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