 74' 1.8 #2 is not firing?, asking for a friend |
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| Type 47 |
 Aug 30 2026, 08:34 PM
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#1
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Senior Member  Group: Members Posts: 806 Joined: 1-June 10 From: St. Louis, MO Member No.: 11,790 Region Association: None 
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L jet
original FI also, installing an 123/Ignition distributor. what is next step?  |
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| Superhawk996 |
Aug 30 2026, 08:48 PM
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#2
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914 Guru Group: Members Posts: 8,021 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Need to determine what is missing the fuel or the spark
That plug on the bottom has previously fired as witnessed by carbon on threads and residue on electrodes but it also looks extremely lean. If I were betting I’d put money on a clogged injector but you need to verify what’s missing and not trust a hunch. |
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| Ninja |
Aug 30 2026, 09:12 PM
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#3
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Member Group: Members Posts: 290 Joined: 25-September 25 From: Granbury Texas Member No.: 29,004 Region Association: Southwest Region |
Not enough info yet...
What do the other plugs look like? Does the fouled plug have a gap? Hard to tell in picture. But, without any info... Compression test Ignition spark intensity test, color of spark across a 1/4" gap Try another plug Fuel tests, pressure, air leakage, maybe fuel quality (if old with alcohol in it). Injector spray pattern tests I agree with the Hawk, the lean plug would bug me. How long has it been in? When is the last time the car ran well? |
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| Superhawk996 |
Aug 30 2026, 09:37 PM
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#4
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914 Guru Group: Members Posts: 8,021 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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(IMG:style_emoticons/default/agree.gif)
All good points In the end what you have there are two plugs and neither looks normal. One fouled rich One running lean |
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| Type 47 |
Aug 30 2026, 09:50 PM
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#5
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Senior Member Group: Members Posts: 806 Joined: 1-June 10 From: St. Louis, MO Member No.: 11,790 Region Association: None
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took plugs out and all were sooty, except #2.
took plugs out, emery clothed them, put them back in and same thing. all sooty, except #2 clogged injector is a good thing to check! |
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| JeffBowlsby |
Aug 30 2026, 10:06 PM
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#6
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914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,348 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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Being Ljet, be sure to check that all 4 wires on the resistor pack are intact on their resistors, and the harness grounds are in fact , well connected to ground.
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