EGR, EVAP, PCV, ECT, 02's, TPS, IAT

Reply Subscribe

Thread Tools

Search this Thread

Apr 13, 2024 | 04:20 PM

#91

nascar

Junior Member

Joined: Aug 2018

Posts: 4

Likes: 0

Quote:

Originally Posted by Jbrew

I haven't heard of them clogging, leaking yes. Tube leak or popet valve malfunction is a 402..check Scorpio here, -

https://www.fordscorpio.co.uk/egrmonitor.htm

EDIT: Scroll past PO402 in red print...keep going to the diagram with 402 displayed, then read below that. The diagram shows the popet as well.

thank you i am confused i just dont know what would cause the constant vacuum at idle there should be none when i pull the vacuum tube off the egr at idle the truck will idle perfect you can feel the line pulling vacuum put it back on and the truck runs with ruff idle so the egr has to be opening and closing thank you