2.0 16v Zetec running problem. Mondeo mk2 '99
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2.0 16v Zetec running problem. Mondeo mk2 '99
9 July 2009, 1:47 PM
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foggy354
Joined 5 Jul 2009
10 posts
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Internals of cat converter decided to come adrift and block exhaust system causing immediate drop in performance and excess back pressure on engine (before I sussed what was going on). Blew a couple of vacuum pipes off (inlet manifold/EGR valve area)and totally trashed servo pipe-Oh s**t... No brakes! New cat fitted,vacuum pipes replaced/reconnected and off we go. Now I find that on light throttle there is an engine judder (hunting rather than a misfire) and revs take longer to drop to tickover when slowing/stopping -car starts up fine,acceleration no prob,cruise@ 60mph+ sweet as a nut, but around town(25-30mph in 3rd/4th gear a right pain). No fault codes showing up on diagnostics. Theres so many electronic solenoids,valves etc. on this emission control system, its unrealistic and not cost effective to change one at a time hoping for a cure. So if anyone's come across this scenario before I would be grateful for your suggestions/diagnosis. same problem as yeti 59
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2.0 16v Zetec running problem. Mondeo mk2 '99
10 July 2009, 9:50 PM
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bigtony
Joined 12 Jan 2005
750 posts
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i would be checking all the vacuum pipes carefully, sounds like an air leak
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2.0 16v Zetec running problem. Mondeo mk2 '99
11 July 2009, 3:16 PM
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foggy354
Joined 5 Jul 2009
10 posts
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i ll try that thanks very much
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2.0 16v Zetec running problem. Mondeo mk2 '99
15 July 2009, 4:34 PM
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Yeti 59
Joined 5 Nov 2008
7 posts
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I have managed to "cure" the low speed judder problem by isolating the EGR valve . Block off the vacuum pipe and the connection on the top of EGR valve. Obviously, as Big Tony has suggested, make sure all the other vacuum pipes on, and linked, to the inlet manifold are sound.
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2.0 16v Zetec running problem. Mondeo mk2 '99
16 July 2009, 4:33 PM
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foggy354
Joined 5 Jul 2009
10 posts
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thanks very much for your help...ill give it a go :)
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