RESOLVED-wits end 944 NA no spark

[Sahara]

I posted this to the original thread : http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/473455-wits-end-944-na-no-spark-post4681145.html#post4681145 but I am reposting it here to hopefully help others with a seemingly impossible no start/ no spark problem.

Since I did not have the budget to tow it to him I called up Autolab ( Mahwah, NJ) to beg for suggestions.

After reviewing what I had done so far he suggested that, lacking an O scope or helper, I use a noid light to check each injector for pulse. No pulse, no DME I/O from sensors. If no pulse, before going through the gyrations of turn the engine a few degrees,slide under and check flywheel for a dowel pin count and do it again and again, check the sensor clearance.

What !! I asked. It died after driving around the corner. How could the clearance change?

So I made up a remote starter switch as per FR Wilk - HOWEVER on this 1988 the connection for the starter side of the harness is a female bullet connector, not a spade connector. I used a 3/4 hp washing machine lid switch in line so I could have very momentary contact.

No injector pulse.


So I pulled the sensors and started to loosen the bracket. Oh, something is wrong. No M6 (10 mm head ) hex head and allen head bolts. Two M8 ( 13 mm head ) hex bolts with 7 washers each on them. The bracket is also ground down to fit the bolts. Damm PO's mechanic.

The bolts loosened and the bracket pivoted up. 3/4 of the bracket. One end was attached to the pivot bolt, another end was attached to the hold down bolt and the middle section was missing. Apparently if was fastened under stress and finally sheared.

So much for logical troubleshooting - a self readjusting clearance.

ANYONE ON THE NY METRO AREA HAVE A SPARE BRACKET ?? A holiday weekend without mail service and I am grounded by lack of a bracket.

Thanks to all who have helped with suggestions on this nightmare.

[earlr85944]

I had the same happen to me, a loose sensor bracket. If you remember when you first called me I did mention it could be something other than the DME. Anyway, congrats on the find. I knew the DME I sent you was good. I do have a few brackets but to install one with the flywheel housing on will require you to modify it. Usually the lower bolt hole has to be cut in half to allow it to slide over the locating "dowell". This can be done and thats how I run mine for e-z removal, but I do run the correct bolts to attach it to the car. PM me if you want me to ship the bracket. It sounds like that is what was attempted by your PO's "mekanic"
BTW if you feel lucky you can install an unmodified bracket but it does require it to be forced on, it will have to bent over the locating dowell, I have done this, sensors should be removed first. make sure you can remove your sensors from the bracket without damaging them, otherwise you may need a 2nd package with sensors. Sand the "new" bracket clean so they sensors can install and remove e-z.
If interested I have a for sale post, bracket and sensors from a running 944, $50 shipped.......
Regards,
rich

[Razorback1980]

Nice work to find the problem. It was confusing. One of these places may have one. They have the engine so they might sell you the bracket.

Hope it works out.

1988
Engine
Porsche 944 88,4CYL-5SP,NO KEY PO0826 $1000 All Auto Recycling USA-VA(Chesapeake) 1-800-253-8469
1988
Engine
Porsche 924 BASE,2.5L,5MT 309531 $1000 Paradise Auto Parts USA-MD(Elkton) 1-888-811-5051

1988
Engine
Porsche 944 2.5,5SPD 84,101 A 138-08 $900 Kneer's Auto Recycling USA-NY(Troy) 1-518-279-9581
1988
Engine
Porsche 944 944 0 A 107608 $800 Millis Used Auto Parts USA-MA(Millis) 1-800-287-4110 / 1-508-376-9680

1988
Engine
Porsche 944 944 999,000 C 80113 $700 Mansfield Used Auto Parts USA-CT(Mansfield) 860-423-4514 / 800-442-4514

1988
Engine
Porsche 924 STD 924 S RUNS NOT RD TETD. NOF $650 Best Foreign Auto Salvage USA-PA(Aliquippa) 1-800-370-6002
1988
Engine
Porsche 924 BURNT 6-06 40540 $Call Medford Auto Wreckers USA-NY(Medford) 1-631-289-1772

1988
Engine
Porsche 944 944- PARTS 140,000 A P50203 $Call Ollies I190 Used Auto Parts USA-MA(Phillipston) 1-800-559-5865

1988
Engine
Porsche 924 P95685 $Call Joe's Auto Wrecking USA-NY(Mount-Vernon) 1-914-664-7874 / 1-800-322-5637
1988
Engine
Porsche 924 NTC,2.5L,5SP,C/R,MFI ,AWD 7H0900 $Call Keyser Valley Auto Parts USA-PA(Scranton) 1-570-346-1248
1988
Engine
Porsche 944 S480 $Call Allied Recycling Inc USA-NJ(MT-Holly) 609-267-8923

[DannoXYZ]

What's the status on this? Did you find a bracket? I've got an extra one I can send you for cost of shipping.