 Why does my '74 1.8 sometimes run so RICH?, After a bit of driving, it won't idle |
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| drdstny |
 Nov 15 2005, 03:24 PM
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51% extrovert, 49% flatulent  Group: Retired Members Posts: 43 Joined: 15-June 05 From: A 4-car garage in Victorville Member No.: 4,281  |
Hello many kindred,
So I drive my 914 every day, about 60 miles per day to be exact. Almost immediately, I noticed that (this is so hard to believe I'm having trouble posting) if the left engine heater hose comes off the heater blower, the car won't idle and will stall unless I keep the R's up above 2K. So...I fixed that with some Tape. Before I Taped it to the blower, it was predictable: if the car suddenly started running rough, rich, with smoke pouring out of it, then I knew I needed to put the hose back on. Since I "repaired" the hose, now it's less certain. About halfway to work, once I hit traffic and have to stop-n-go, it idles rough. VERY rough, and I need to side-step the gas to keep the engine from stalling. Smoke will come pouring out of the tailpipe, my eyes water, can't breathe, lose faith in humanity, diet goes awry, idle won't calm down...you get the idea. Seems like it only does this after about half an hour of driving, and USUALLY letting it sit for a couple hours will make the problem go away. Not always, but usually. The first thing I tried was changing both seals (O-ring and gasket) on the oil cap (recall it's a 1.8), but that made zero difference. So...anybody have any idea what's wrong? Just as good: anybody have a list of things I can test or replace until the problem is fixed? This is a serious issue, and the last two tanks of gas have been sub-20MPG so I'd really appreciate the help. I'll send something nice to the person who gets me out of this jamb. Thanks! |
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| John |
Nov 17 2005, 10:08 PM
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
I think it is the air box. I think it is warping from old age and when it gets warm, it can get in a bind. I have seen 911 Carrera Air Flow Meters act sticky exactly like that.
It could be one of the temp sensors (or wires to temp sensors). If you have a break in the wire somewhere, it will be open circuit (infinite ohms) and will run rich. I have a complete working 1974 1.8 fuel injection setup for sale now in the classifieds. (Good quality spare parts....) |
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Posts in this topic
drdstny Why does my '74 1.8 sometimes run so RICH? Nov 15 2005, 03:24 PM
Rockaria Could it be the Cylinder Temp sensor near the #3 s... Nov 15 2005, 03:49 PM Cap'n Krusty Bad airbox. The Cap'n Nov 16 2005, 02:51 PM jim_hoyland Airbox Nov 16 2005, 08:33 PM bd1308 what does "bad airbox" mean?
don't you mean A... Nov 16 2005, 08:40 PM Dave Bell Airbox = AFM... what everybody said above...
If v... Nov 16 2005, 09:04 PM drdstny OK, good leads so far, lots pointing to the air bo... Nov 17 2005, 05:20 PM billswim I've got a couple but you need to see how many... Nov 17 2005, 06:46 PM Rockaria If I were to guess at one thing... The part that m... Nov 17 2005, 09:16 PM sean_v8_914 I love L-Jet!
check the simple, cheap stuff F... Nov 18 2005, 03:29 AM
drdstny OK, found that problem and created a new one.
On ... Nov 21 2005, 01:24 PM |
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