Slight rolling idle and a little rough at tickover

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   Thanks levy, I read that post with interest when I was initially diagnosing the problem. I've gone ahead and changed the hose in the FCC, it looks like the hose was past its best. I didn't change the filter or o-ring so need to pay close attention to ensure the FCC canister doesn't develop a leak. 

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Alcarlaw Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: June-26-2010 Location: Scotland Status: Offline Points: 78	Post Options Post Reply Quote Alcarlaw Report Post Thanks(0) Quote Reply Topic: Slight rolling idle and a little rough at tickover Posted: June-17-2013 at 7:21pm
	Thanks levy, I read that post with interest when I was initially diagnosing the problem. I've gone ahead and changed the hose in the FCC, it looks like the hose was past its best. I didn't change the filter or o-ring so need to pay close attention to ensure the FCC canister doesn't develop a leak.

lewy2001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234	Post Options Post Reply Quote lewy2001 Report Post Thanks(0) Quote Reply Posted: June-15-2013 at 10:53pm
	Guys this old thread on GT40 Rolling Idle (loping) should give you a good start.
	If you're going through hell, keep going 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta

bigwavedave Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: March-08-2006 Location: United States Status: Offline Points: 199	Post Options Post Reply Quote bigwavedave Report Post Thanks(0) Quote Reply Posted: June-15-2013 at 10:56am
	I'm having a same problem with my 95 GT 40 I'd appreciate if you let me know how to fix Thanks Dave
	bigwavedave

Alcarlaw Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: June-26-2010 Location: Scotland Status: Offline Points: 78	Post Options Post Reply Quote Alcarlaw Report Post Thanks(0) Quote Reply Posted: June-15-2013 at 6:55am
	My GT40 has developed a slight rolling idle and also seems to run a little rough under load at low rpm ( and I mean slight on both counts, if I didn't know the engine I wouldn't think anything was up with it. Watching the rpm gauge on the Perfect pass, the change in rpm is minimal, 30-40rpm but you do feel the engine hesitate and judder slightly, it just doesn't feel as smooth as it should. I've already replaced the relay to the ECM and the idle air control valve so my next plan is to replace the hose inside the FCC just in case it has developed a crack. Question, as I replaced the FCC filter not too long ago so it doesn't need replaced, is it an absolute no no to open the filter can to replace the hose and not change the o-rings?? If it comes to it, I'll just purchase a new filter and o-ring but they are a little tricky to come by in the UK and are expensive..... If this doesn't provide a fix, would it be worthwhile changing the plug leads, maybe one is starting to break down.

Slight rolling idle and a little rough at tickover

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