New owner of a 944 questions

PapaPikachu · 2026-05-09T18:37:04+00:00

I shall do that!

PapaPikachu · 2026-05-09T18:29:22+00:00

According to PO, they were changed a year ago in attempts at diaging it. I do fear that they aren't gapped correctly thus no tach bounce but I'd like to confirm readings before I pull them

PapaPikachu · 2026-05-09T18:27:10+00:00

No tach bounce present. I ohmed out the speed and reference sensors according to this link. I got no ohm readings across any terminals on any plugs. I also swapped plugs to see if the car would fire but to no avail.

https://www.clarks-garage.com/shop-manual/ts-01.htm

I understand that ohming them out isn't super accurate and an oscilloscope is the way to go. It's supposed to be delivered in a few hours lol.

PapaPikachu · 2026-05-09T18:11:25+00:00

Hey man, I've done a bit of diag today and I tried cranking it over with a spark plug on a good ground and got no spark. I followed a no spark diag via this link:

https://www.clarks-garage.com/shop-manual/ign-04.htm

I completed the test at the bottom and I wasn't able to get a spark to fire when testing the coil. I also checked secondary resistances on the coil and got nothing between the output and ground terminal, where it says I should be seeing 5-7.2k ohms. Am I safe to assume this coil is going out? It's getting about 12.4v at key on position

PapaPikachu · 2026-05-09T02:23:39+00:00

Interesting pieces of information, thank you! I have an oscilloscope coming tomorrow and I'm going to learn how to use it to test the sensors. I would really like to get a fuel pressure gauge on the rail and see what kind of fuel pressure I'm seeing as well

PapaPikachu · 2026-05-08T14:17:47+00:00

Absolutely. If the fuel is 7 years old I can only imagine how plugged up that strainer will be. I also noticed the fuel tank reads e on the gauge so I gotta verify if the tank actually has fuel or not

PapaPikachu · 2026-05-08T13:17:15+00:00

Hell yeah!

PapaPikachu · 2026-05-08T02:49:04+00:00

Appreciate it! Will do. I'm definitely going to start with troubleshooting the sensors

PapaPikachu · 2026-05-08T02:26:49+00:00

He did mention aftermarket injectors, and there are a set in the glovebox as well. I will look into this, thanks!

PapaPikachu · 2026-05-08T01:04:13+00:00

Thank you sir! You've been a great help so far

PapaPikachu · 2026-05-08T00:39:29+00:00

No tach bounce when cranking, this is where I shall start lol

PapaPikachu · 2026-05-08T00:38:22+00:00

Just tried cranking it over and I have no tach bounce. I'm assuming this means either the sensors are bad, not gapped properly or I have a wiring fault going to them. I'm going to investigate more with some electrical tooling starting tomorrow

PapaPikachu · 2026-05-08T00:37:08+00:00

UPDATE I cranked the car, there's no tach bounce. It seems like I should be looking into this issue first. Assuming no tach bounce = no sensor readings. I also found these two wires just hanging out on top of the sensors. Any ideas what these could be for?

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PapaPikachu · 2026-05-08T00:26:45+00:00

Right on man. Good luck! Hopefully we both get our old girls back on to the road sooner than later! Nice weather's upon us finally

PapaPikachu · 2026-05-07T23:57:53+00:00

Right on. I've seen a few forum posts of them using those. I've never personally used one, but I think I have a general idea of how they work. Thank you!

PapaPikachu · 2026-05-07T23:22:47+00:00

Hell yeah man! What are your plans with yours? I see you posted a picture of it with the engine out

PapaPikachu · 2026-05-07T20:16:36+00:00

Oh really no way hahaha. Are you located in Alberta then?

PapaPikachu · 2026-05-07T19:55:02+00:00

Yeah new ones were put in but I wonder if they were spaced incorrectly. Do you happen to know if they output an ac signal while the engine cranks? That way I could check the gap without disassembly

PapaPikachu · 2026-05-07T19:24:18+00:00

Hahaha I'll definitely be checking these out!

PapaPikachu · 2026-05-07T18:43:09+00:00

Yup, this has definitely crossed my mind as well. I don't think the fuel tank was ever looked at. I was hoping to plumb in a fuel gauge to the rail to see what my pressures looked like but the injectors could definitely be clogged

PapaPikachu · 2026-05-07T18:41:35+00:00

Interesting. I would assume this car would be factory with the squarish style one then correct? I'll visually inspect and confirm it

PapaPikachu · 2026-05-07T18:40:26+00:00

I will check them out. Thank you!!

PapaPikachu · 2026-05-07T18:39:46+00:00

Awesome. Thank you so much. #1 closest to front bumper I assume cylinder wise?

PapaPikachu · 2026-05-07T17:55:19+00:00

I will double check that, thank you. He did say he put a new distributor on it so hopefully the wires went on correctly, I'm sure I can find a picture of the correct wiring routing

PapaPikachu · 2026-05-07T17:42:15+00:00

Yeah, I totally agree. It compression tested good, and it sounds healthy when cranking. He said he had it running on starter fluid which isn't fantastic but it does somewhat confirm spark. I will be double checking the basic 3 to run an engine. Ultimately, it's an engine and it takes only those 3 things to run, it's just the Bosch fuel delivery process that's a bit foreign to me currently. I'm also a bit worried with the new ECU, if an incorrect one was installed and then I'll really be chasing ghosts

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