Hey, new member here. Purchased a 1991 SHO year ago. Ran like a dream until the other day when car would not start. Car cranked until battery died, but no start. Took to shop where they installed new fuel pump, fuel filter and new battery. Ran fine for 1/2 hour then died again. Cranks but no start. Fuel pressure OK. Shop indicates to me no spark. Anybody have any ideas on what to look for? Could it be computer related? Love my 91 SHO.
91 SHO cranks but no start
- Thread starter jmulle1
- Start date
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frosho
WOLFMAN
http://www.shophoenixproject.com/eec/eec.htm
Follow that link to learn how to pull trouble codes from the car's computer. It's easy, and all you need is a paperclip (or a jumper wire). Post the results back here and we'll help you get your SHO running again.
Welcome to the forum. :wave:
Follow that link to learn how to pull trouble codes from the car's computer. It's easy, and all you need is a paperclip (or a jumper wire). Post the results back here and we'll help you get your SHO running again.
Welcome to the forum. :wave:
Thanks Matt. Unfortunately, my car is in the shop and they can't figure it out. Not a Ford dealership. They're to the point where some type of a jumper box is needed (whatever that means). I guess it is something that diagnoses computer problems or something. They said it was a very expensive Ford tool of some sorts. Some kind of a troubleshooting, diagnosis box. Does that sound familiar? Anyway, they are calling around to other fixit shops to see if anybody knows what the problem might be.
shobote
SHO Member
You'll get no spark if the CPS is going south. How many miles on it, and has the 60k maintenance including t-belt, H2o pump, cps been done ?
Winterhawk
1993 SHO ATX
This sounds like a breakout box used to pin point wires each numbered on the box. Sounds like a cam or crank sensor. I have problems also that I am having a hard time figuring out. I hope one of these Guru's on here can help.
BlackonBlack89
SHO Member
CPS, cam sensor, dis ,coil, or grounds. Old sprak plugs and wires should be replaced. Has to be one of those sensors/modules. The first one is not a simple fix. The others are cake and could do it urself in less than hour.
Sounds like a CPS as it ran for 1/2 hour then died. Bet it would start in the mourning or in a couple hours.
Sounds like a CPS as it ran for 1/2 hour then died. Bet it would start in the mourning or in a couple hours.
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Yes, breakout box. That's it. Car has 120,000 miles on it. Bought it one year ago, so not sure what warranties have been kept up on it. Shop tech mentioned something about a CPS. Is that the cam sensor? Thanks all for your help.
BlackonBlack89
SHO Member
Crank position sensor.
Yea this is common failure after a long time. You are due for the 2nd 60k service anyways, unless u know, it probably never had the 1st one performed. Hence the failure. Time to look into all the parts needed for it, here's some places to find them.
www.shonutperformance.com
www.shosource.com
Yea this is common failure after a long time. You are due for the 2nd 60k service anyways, unless u know, it probably never had the 1st one performed. Hence the failure. Time to look into all the parts needed for it, here's some places to find them.
www.shonutperformance.com
www.shosource.com
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shobote
SHO Member
CPS = crank postion sensor. Timing cover needs to come off to replace, which is a big effort, but it is due for the 60k service with timing belt, water pump and cps, so needs to be replaced anyway. They can go bad when the water pump is leaking and drips fluid onto it; might be the former owner never replaced it at the last 60k too.
frosho
WOLFMAN
Sounds like the shop thinks they need a scanner to get codes out of the computer. That's not true. If they (or you) follow the instructions in that link, you'll have some codes to work with.
My bet is on a bad crankshaft position sensor, as others have mentioned. The only way to really know what's going on is to get those codes, though.
My bet is on a bad crankshaft position sensor, as others have mentioned. The only way to really know what's going on is to get those codes, though.
Just spoke with the technician and says that he can get codes but his machine can't read the codes. I mentioned to him the camshaft position sensor and the fact most of you are saying this could be the problem. He said he would take that as an educated guess and look into. Problem is, maybe the engine needs to be removed? How expensive is replacing the camshaft position sensor? Anybody have a close guestimate? Everybody has been a great help. To Frosho, if the machine being used to read the codes is not compatible with my car (codes being read but not understood), would what you suggest work?
DrivinFast
New Member
Its a CRANK shaft position sensor that would cause the problem and is located under the timing belt cover. A CAM shaft position sensor is totally different and is much easier to replace.
Blackdr16
93 SHO
Crank Position Sensor will def. cause this problem, I have a 93 MTX and mine did almost the same thing. Crank and crank, sometimes if it would start itd have no tach signal. Replaced it, no more problems 
frosho
WOLFMAN
You don't need a machine at all to get the codes. You use a wire or even a paperclip to jump two test terminals together, and the codes are displayed by the check engine light. There's a little more to it than that, but it's all on that website...
shotime1994
AirHammerAndrew
You do NOT have to remove the engine to do the crank sensor it's under the timing belt cover.
shobote
SHO Member
As said earlier, do the water pump, timing belt and CPS as it will likeley fix the no start issue and it needs it now anyway. It is essential to do the required maintenance on these engines or else problems will arise, like not starting. You also need to do valve lash, spark plugs, valve cover gaskets, etc to keep oil from dripping into the spark plug wells and ruining the ignition wires too. It will not be cheap to pay them to do the 60k work, as this is a lot of labor time, so be prepared.
SHO_ROLLER_2
Well-Known Member
First, has the mechanic ever worked on an SHO before? If not, find somebody that has or do the work yourself.
There is only ONE person within a 100 mile radius I would let anywhere near my car and he charges $98/hour.
I had the service dept. at the dealership I work at look into the hours it would take to do a Front 60K and it came to 10 hours, but there is no reason the engine would have to my removed.
There is only ONE person within a 100 mile radius I would let anywhere near my car and he charges $98/hour.
I had the service dept. at the dealership I work at look into the hours it would take to do a Front 60K and it came to 10 hours, but there is no reason the engine would have to my removed.
OK, finally back. Finally found a reputable repair technician who was able to get and read codes. Turned out to be the CPS and also needed a new timing belt and new seals. Fuel pressure was 10 psi, so needed a new fuel filter and also a new battery. Battery cables needed to be replaced as whoever had car before me didn't take proper care and cut and spliced old battery cables. Negative was connected to something it shouldn't have been. All told, to fix was approx. $1400.00. Will be picking up today. Hopefully all is well. Thanks to everybody who provided insight and knowledge into what the problem might be. You are right!!
SHO_ROLLER_2
Well-Known Member
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