 Way too much gas, 73 1.7 with FI |
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| EJP914 |
 Jun 24 2026, 09:10 AM
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#1
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Member  Group: Members Posts: 295 Joined: 14-June 03 From: Monroeville, PA Member No.: 821  |
hello!
Looking for some ideas on why the spark plug electrodes are wet with gas after running the car for only about 20-30 seconds. Something is causing way too much fuel into the engine. Car starts at the turn of the key, but stumbles and runs rough. Exhaust smells like gasoline. I have checked, replaced, or installed known good parts. New plugs, points, condenser. Cleaned trigger contacts. Distributer other wise works as it should. Swapped in known good relay board and relays Swapped in known good ECU. Installed new fuel injectors, Standard Mfg type. Fuel line pressure at 25 lbs. Swapped in “adjusted” MPS. (Maybe still too rich?) Timing is good but not spot on. I have not yet checked CHT sensor or cold start valve (may be stuck open?). Not sure what else to check? I have never seen this much gas get pumped into an engine. I would very much appreciate any advice and/or guidance. Thanks. EJP914 |
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| burton73 |
Jun 24 2026, 10:30 AM
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#2
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Senior member, and old dude Group: Members Posts: 4,034 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California 
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I don't know why your car is pumping too much fuel but, I want to point out that you definitely need to change your oil or you can spin a bearing. I did that in a MFI 911 way back when I was 27
Best Bob B |
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| emerygt350 |
Jun 24 2026, 02:01 PM
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#3
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Advanced Member Group: Members Posts: 3,646 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(burton73 @ Jun 24 2026, 10:30 AM)  I don't know why your car is pumping too much fuel but, I want to point out that you definitely need to change your oil or you can spin a bearing. I did that in a MFI 911 way back when I was 27 Best Bob B Yeah. Check your oil... It may be mostly gas. |
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Posts in this topic
EJP914 Way too much gas Jun 24 2026, 09:10 AM
FlacaProductions I'd check the cold start valve. Jun 24 2026, 09:13 AM brant CHT and mps failure both cause excessive rich cond... Jun 24 2026, 09:43 AM JamesM
Swapped in “adjusted” MPS. (Maybe still too ... Jun 24 2026, 09:43 AM emerygt350 Check you cht just in case. Easy peasy. Then che... Jun 24 2026, 10:08 AM
wonkipop another possibility. fuel pressure regulator diap... Jun 24 2026, 03:38 PM |
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