86 944 new clutch/flywheel, won't start
12-09-2011, 03:56 AM
#1
Instructor
Thread Starter
86 944 new clutch/flywheel, won't start
Well after doing all of my homework i decided to install a new SPEC stage 2 clutch and SPEC aluminum flywheel. I adjusted the dowlings on the flywheel and made sure that they were exactly the same as the OEM flywheel studs. I even bought reference/speed sensors. I attempted to start the car and the only needle jumping in my dash was my battery- oh manhttp. Car didn't start. SO i swapped the reference sensor with the speed sensor and it still did not start. I checked my fuse box just to double check and all my fuses were good. besides the sensors why wouldn't the car start? Is there a way the DME would tell me why by giving me some kind of code.
12-09-2011, 04:08 AM
#3
Instructor
Thread Starter
no tach bounce- just battery bounce. When I started the car the first time the tach didn't move. Then I swapped the sensors and it still did nothing.
12-09-2011, 04:10 AM
#4
I had that happen when I did the clutch in my 84. I swapped the plugs that go to the speed and ref sensors and it started right up. I had them in incorrectly and it won't run unless they are correct.
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danielceee (03-09-2024)
12-09-2011, 04:16 AM
#5
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Thread Starter
I wonder if my flywheel studs that the reference sensors pick up have anything to do with it. Could it be that they are not getting picked up by the sensors. I checked and double checked them to make sure they were out enough for the sensors to read them- i have no clue why the car won't start.
12-09-2011, 07:35 AM
#6
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12-09-2011, 11:39 AM
#7
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Thanks Yarf, but I've done my homework on Clarks already- if I just pulled the sensors out without touching the retaining bolts during the flywheel and clutch job, why would I need to adjust it now? I give it a shot though. Is there a way for me to check the DME. Would it tell me why my car won't start?
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12-09-2011, 01:27 PM
#9
Rennlist Member
You need to check the gap any time you do major surgery like that. The tolerance for working isn't that big.
Ha. These DME's are using first generation microprocessors. They do not store failure codes. The way to tell if the DME is unhappy is to measure it's behavior. I bet you're not getting spark. Even though there's many reasons for that, it's mostly likely your reference sensors not picking up the metallic movement.
Ha. These DME's are using first generation microprocessors. They do not store failure codes. The way to tell if the DME is unhappy is to measure it's behavior. I bet you're not getting spark. Even though there's many reasons for that, it's mostly likely your reference sensors not picking up the metallic movement.
12-09-2011, 09:09 PM
#10
Rennlist Member
i would still check the gap as you could be too far for the ref sensors. I have a tool that when dropped into the ref hole over a set screw will touch it-so you basically adjust the bracket until it touches, leaving a slight gap when you put the sensor in- they sell them around. Also make sure you loctited those set screw in as they have a tendency to fly out.
12-09-2011, 09:35 PM
#11
Instructor
Thread Starter
I probably need to put some Loctite on the flywheel hex stud. It was pretty easy to loosen. Is it Loctite 270 that I should be using on that stud? I figured the only adjusting I would need to do is the stud on the flywheel, but I'll give the gap adjustment a try via clarks garage manual.
12-10-2011, 01:18 PM
#12
Instructor
Thread Starter
Is there a schematics of the ground locations on the 944. Would a bad ground really keep the car from starting, or would it short one of my fuses. I know I disconnected a couple of ground wires around the reference sensors and the wires on the starter when I changed the clutch.
12-10-2011, 01:30 PM
#13
Check your sensors with an ohm meter and then check them for pulse while someone tries to start it. That will tell you if the sensors are getting signal. Also jumper your dme relay and check things over
12-11-2011, 11:03 PM
#14
Instructor
Thread Starter
Well- I went to adjust the sensor to .8mm via clarks-garage shop manual thinking that it would start right up...but it still won't start. I checked all my ground points and the speed/reference sensors are brand new! I just don't get it- I'm about to throw in the towel. Can't believe that after spending so much time doing my own clutch job, I'm still gonna end up getting it towed to a shop to get my wallet raped.
12-19-2011, 11:02 PM
#15
Instructor
Thread Starter
Well, I dropped my car off today at EF1 Motorsports here in Long Beach CA. They were really awesome didn't mind, as I showed up 30min before closing. They charge a flat rate of $110 for inspections. If you require maintenance, then thew will subtract that $110 from repairs. Pretty nice. He's going to call me tomorrow to let me know why my car won't start and what they find.
