Ditchdevil

I have an "01 Forester and my Stock EJ20 went out, so i bought a new rebuilt EJ20 Longblock to put in. I swapped all external parts and sensors from old motor to new. Put everything back in, but now when i try to start the car i get fuel, but i only have SPark in the #1 and #2 cylinders! #3 and #4 have NO SPARK. I dont know what the problem could be, Please help!

Blue Fox

Back-track everything and check all leads/wires/etc. Only advise I can really give you to be honest. It's something not connected correctly.

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2004 XT - RIP
2005 XT - 5MT - JOURNAL

Real Lyte

The coil packs on that generation have common issue with grounding out, use the water mist test at dusk.

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05 2.5RS (mine)
'02 Civic LX
They live on.

Ditchdevil

Thread Starter

Can I get more info on this test plz

flstffxe

In a low light environment(night/low light garage) take a spray bottle and mist over the coil and look for the ark of it shorting out.

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His - 08 X Prem 5mt
Hers - 08 X 4EAT
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Real Lyte

Just to make this more clear, the coilpack is where all the spark plugs wires go on top of the block, its a black thing with 4 terminals.

__________________
05 2.5RS (mine)
'02 Civic LX
They live on.

Ditchdevil

Thread Starter

Wouldn't it be a better test if I just switched the coil pack and checked if my number 2 and 4 were firing? And if I do that and still no spark, what sensor could be doing it? Thanks for the help

Ditchdevil

Thread Starter

are there any sensors that could cause the two cylinder not to spark because of improper voltage?

funkymonkey1002

Just one thing I noticed reading back over your original post. No USDM foresters have ever had the EJ20. The only models that had a 2.0 were the 02-05 WRX.

You could change the coilpack, but they're pretty pricey so doing the arc test is usually an easier initial test. How are you testing for spark? Are you sure theres no spark or is it just misfiring? Are you getting any CELs?

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04FXT/4EAT Snorkus Free, WRX suspension, sti up, prodrive ypipe, rota/falken/racingbrake/hawk

Ditchdevil

Thread Starter

Sorry its my friends car and he said its a EJ25 OR EJ20. I'M new to the subaru world so I'm not sure bout engine codes.

But yes I've done spark testing from the plug cables and I'm gettin spark in 1 and 2 but not 3 and 4. I've also done resistance testing on the ignition coil and all are in specs. The car previously ran before switching parts over to the new block so I've come to figure the ign coil is good. So now I'm looking to do a voltage drop on the connecter that plugs into the ign coil. But I need a pinout so I know what pin to check for my voltage drop. It's the 4 pin connector and I believe the green is ground. Pleeeeease if anyone has the pinout or knows it, let me know. Thanks everyone for the help.

TFBHTMFSNE

Double check your cambelt timing setup. If the timing between the crank and cam sensors is out, you can sometimes lose spark on the back two cylinders.

Mr_evo

So did you find out what the problem was Iam having the exact same problem after an engine swap please help thx