 runs like a pig today - help |
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| boiledcabbage |
 Apr 20 2008, 03:11 PM
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#1
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Member  Group: Members Posts: 50 Joined: 23-May 05 From: Ottawa, Canada Member No.: 4,131  |
Hi - started my stock 74 1.8 ljet yesterday after rescuing from its winter tomb - ran like a charm so thought I'd shine it up. Today (of course) being sunny and warm its starts up and runs like a pig. Chugging at idle, sooty exhaust - suspect it is running rich - any one have any ideas where to begin? I see lots of advice re lean running on Ljets due to vacuum leaks as the cause but this?
Is there a simple way to check the cold start valve is working when it should and not leaking ie how do you isolate it? Any help much appreciated |
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| shaggy |
Apr 20 2008, 03:47 PM
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#2
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mechanic/welder/fabricator Group: Members Posts: 702 Joined: 26-September 05 From: Gilbert, AZ Member No.: 4,869 Region Association: None |
when does it run crappy?
whats your ambient temp? does it run well at start up then as the engine warms begin to smoke and idle poorly? best way to test it if you think the cold start is bad then you should be able to just unplug the injector. check the air filter. if you have a vac leak you would have a rich mix at idle and it would lean out to the correct mix as rpm is increased. |
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| SirAndy |
Apr 20 2008, 04:10 PM
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#3
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Resident German Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
did you touch anything in the engine comp when you "shined her up" ?
(IMG:style_emoticons/default/idea.gif) Andy |
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| boiledcabbage |
Apr 20 2008, 08:50 PM
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#4
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Member Group: Members Posts: 50 Joined: 23-May 05 From: Ottawa, Canada Member No.: 4,131 |
QUOTE(shaggy @ Apr 20 2008, 01:47 PM)  when does it run crappy? whats your ambient temp? does it run well at start up then as the engine warms begin to smoke and idle poorly? best way to test it if you think the cold start is bad then you should be able to just unplug the injector. check the air filter. if you have a vac leak you would have a rich mix at idle and it would lean out to the correct mix as rpm is increased. thanks - will check that - as for the cold start valve - want also to be sure it just isn't leaking - I guess I can just unbolt it and crank it over (?) |
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| SGB |
Apr 21 2008, 02:07 PM
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#5
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
Some winter crud dislodged into the fuel filter?
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| r_towle |
Apr 21 2008, 03:07 PM
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#6
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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