Kevin Michael

This is about the 87 5 spd. She was running fine yesterday. In the 2 years I have owned it it has always started. today I crank and crank and nothing. It has a new MAF ,coils, wires, plugs, temp 2, fresh battery as of today. the fuel pump is running for the 2 sec. on first crank. I have good spark at all plugs and I swapped the lh from my other well running 87 as well as the ezk and still no start. I believe the reference(crank) sensor is fine because the tach needle bounces while cranking.She cranks anxiously but will not catch.I drive this car about every two weeks for a couple of hours,and last week my belt tension light came on for about 30 sec. then I shut her down! Next day drove it and no belt warning. Checked belt and was within spec with my Kempf tool. Oh 928 gods answer my no start condition and I will lay on your alter a case of beer and dinner for two!( That is a serious offer to whoever diagnoses this problem!) Thanks ,Kevin

WICruiser

I think in these cases the old adage is "relay, relay, relay" start there before you get to to carried away.

SharkSkin

The fuel pump is running... but does it sound like it's building pressure? Do you smell gas at the tailpipe? If not it's possible the wimpy in-tank pump is running, but not the main pump... Or that the in-tank pump has failed & blocked the inlet.

FlyingDog

Engine or CE grounds, or LH relay. Do you hear the injectors firing when cranking?

Bill Ball

If you are sure you have spark at all plugs, then it must be fuel. When you pull a plug after all this turning over, is it dry? If so, then check the fuel pressure or check flow out of the pump. Oh, and jump the LH relay as others suggested just to make sure.

Kevin Michael

Sorry , forgot to mention I swapped all the relays pertinent to this problem. I don't think the 87 has an in tank pump. Maybe someone can verify. This 928 is insanely maintained and has always been good to me. I have no idea why it is so mad at me. I will be working on it further today. Thanks to everyone and I look forward, with your help, to get her purring tonight!

FlyingDog

I tried that on my car last week. All four relays needed for starting and running the car were bad in some way. I had to swap from another panel to find enough good relays. Does the LH have a fuse in the newer cars?

Kevin Michael

Hey Matt! Yeah, they have a fuse from what I can understand. I have an auto 87 s4 running perfectly that I am swapping parts with to diagnose this problem. So relays maf , computers , anything imaginable I have access to!
Thanks, Kevin

John Speake

The LH relay does not have a fuse.....if you have spark, and you have swapped the LH relay, then the next suspect is the LH ECU

blau928

When was the last time you changed the in tank fuel filter..? It could be causing a restriction to the FP. You mentioned the belt light came on breifly.. It is possible, that you have a skipped belt tooth on the TB. It may require you to check the Timing marks on the Cam gers with the motor at TDC. I remember once, that happened to MK's race car, and we reset the TB and bingo, everything fine... This was at Laguna Seca...

87 S4 do not have in tank pump, but do have the in-tank filter.. I changed mine a few years ago, and it was very cruddy...

HTH,

Kevin Michael

hey guys, Is the crank position sensor on the 5 spd 87 supposed to be all loose and sloppin around? I think I am being punished for challenging sniper to a race. If this is the case I officially apologize to Sniper and my 87!

Bill51sdr

Uh, no. Reward yourself, you may have found part of the problem, although it is curious that you say you have spark...

hacker-pschorr

Must be the blinker fluid.

Kevin Michael

Yeah Bill, I was surprised myself! The thing just spins and wobbles with your hand. I just retested for spark,only one on each side this time, I am getting a strong spark. This thing has always ran like a champ and I havent even had the hood open for weeks. Just all of a sudden. Right now I am checking the cam positions,belt and timing. Maybe she jumped a tooth and threw herself outta whack.I have never set the marks on a 32v. I imagine before moving the belt i'll set the crank at 45deg.? Is it then safe to line things back up? Thanks , Kevin

Bill51sdr

If you don't have the timing belt covers off yet, you can check the belt timing without doing so. Remove the intake inlet tubes and you will see a 'pointer' inside the port of the upper belt covers. At TDC, #1 cylinder, you will see a notch on each cam pulley that will line up with the pointers in the covers. I would do this prior to tearing it all apart as the liklihood of the belt skipping a tooth or two is not likely and would not necessarily cause a no-start.