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914World.com _ 914World Garage _ 74' 1.8 #2 is not firing?
Posted by: Type 47 Aug 30 2026, 08:34 PM
L jet
original FI
also, installing an 123/Ignition distributor.
what is next step?
Posted by: Superhawk996 Aug 30 2026, 08:48 PM
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.
Posted by: Ninja Aug 30 2026, 09:12 PM
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?
Posted by: Superhawk996 Aug 30 2026, 09:37 PM
All good points
In the end what you have there are two plugs and neither looks normal.
One fouled rich
One running lean
Posted by: Type 47 Aug 30 2026, 09:50 PM
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!
Posted by: JeffBowlsby Aug 30 2026, 10:06 PM
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.
Posted by: Type 47 Aug 31 2026, 05:40 PM
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.
OK will check next time I have a chance to go over to where the car is.
So I'm assuming L jet has tendencies to have ground issues, or am I reading too much into that?
Posted by: JeffBowlsby Aug 31 2026, 08:13 PM
Not ground issues per se, but the injector wire attachments to the resistors are a known weakness, taking out each injector associated with a wire break.
Posted by: StarBear Sep 1 2026, 06:05 AM
Had that a while ago, also on #2. The contact on the inside of the dizzy cap was dirty, so no spark. Cleaned it and all ok.
Still the over rich condition, too. Inside cap cleaning wouldn’t hurt that either.
Posted by: rfinegan Sep 1 2026, 07:15 AM
swap 1-2 injectors and see if the problem follow the swap to 1..
no cost and can be done wit simple hand tools it 10-15 mins
do you hear it miss firing? duh, duh, duh, duh....etc
Posted by: Type 47 Sep 1 2026, 08:51 AM
Had that a while ago, also on #2. The contact on the inside of the dizzy cap was dirty, so no spark. Cleaned it and all ok.
Still the over rich condition, too. Inside cap cleaning wouldn’t hurt that either.
new cap
Posted by: Type 47 Sep 1 2026, 08:52 AM
swap 1-2 injectors and see if the problem follow the swap to 1..
no cost and can be done wit simple hand tools it 10-15 mins
do you hear it miss firing? duh, duh, duh, duh....etc
great idea!
Posted by: L-Jet914 Sep 2 2026, 06:54 PM
If you have access to noid lights, you can connect one to #2 injector connector. Disable fuel and crank the engine over and see if the noid light illuminates. That will tell you if it's activating that injector.
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