Go Back   Ford Mustang Forums > Mustang > 5.0 Mustang > 94-95 Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

1994-1995 5.0 Mustang SN95 Tech Forum

5.0L Talk | 5.0L Tech | 94-95 Tech | 1979-1993   1994   1995   Upload Pictures | Timeslips | Power Adders | Mustang Tech 


Reply   Post New Thread
Unread 03-09-2006   #1 (permalink)
mxndemon is offline Rookie


Joined: Oct 2005
Posts: 34 Threads: 11
 mxndemon's Country Flag
Los Angeles   California
mxndemon is on a distinguished road
Thumbs up Replace Pick-up Coil/Distributor Post !

i finally found my prayer post thanks MLC Stang this weekend its finally gona be done =) was there anything else anyone can add ?




Irange,

I’ve gone through this exact same problem with my 95 GT.

It’s the PIP module in your distributor. That stands for Profile Ignition Pickup module. It’s also called a Hall Effect sensor, because that’s the name of the solid state device that makes the PIP work. And, the Ford parts books call it the distributor Stator, because it’s the part that doesn’t move. The rotor (a round disk with a window cut in it for each of the eight cylinders in the engine) spins through it.

It is the equivalent to a crank sensor on a Ford modular 4.6 liter V8. Because our cars still have distributors on them this sensor must be in the distributor, not on the crankshaft.

When each window passes the Hall Effect sensor in the PIP module, the permanent magnet in the PIP module causes a voltage to flow through the Hall Effect sensor. That voltage is read by the PCM (the EEC-IV main computer) and tells it exactly when each cylinder is at base timing (e.g. 10 degrees BTDC). Armed with that info, the PCM can tell the TFI Ignition module to switch the ignition coil to fire each spark plug at the right time.

The problem with Hall Effect sensors is that they are extremely temperature sensitive devices. In extreme duty environments like sitting on top of a car engine, the cylinder heads of which typically get to around 230 to 240 degrees F, the sensors require sophisticated temperature compensation circuitry to provide a constant (and accurate) signal over a temperature range from about -40 degrees to +240 degrees F. Since they have an analog output (that looks like a sine wave), they also require clipping circuitry to make the analog signal look like a nice clean digital (ON or OFF) signal to the PCM.

It does get worse over time, and it’s really not safe to have your car die on you in the middle of traffic! After just a couple of weeks mine was crapping out at least 3 or 4 times a day just like you reached over and turned off the key. Really not safe! The thing is temperature sensitive, so once it starts to degrade it will just continue to get worse.

The part only costs about $50.00 at the Ford dealer. The bummer is that the distributor has to be removed from the car to install the thing! The sensor portion slips over the center shaft of the distributor, so the drive gear has to be removed from the bottom of the distributor to install it.

Replace your PIP module, and you’re good to go!

Install Instructions:

Unless you have had a distributor apart before and re-installed one and got your ignition timing right, you should have someone else do this. You can spend all day getting the distributor back in right. If you don’t, your timing is hosed!

The drive gear on the bottom of the distributor shaft is held on with a pin (metal shaft) that’s inserted through the gear and into the distributor shaft. You have to take a punch and drive the pin out, then pull off the gear with a gear puller if it’s on really tight. Don’t hit it with a hammer!

The stator (PIP module) is inside the distributor case (the big part at the top that the distributor cap mounts on), BUT it is in the very BOTTOM of that part! When you pull the entire distributor shaft up and out of the body after you have removed the drive gear from the bottom, you will see where the old one mounts in the bottom of the distributor bowl (case). You just can’t get access to that area without pulling the entire innards of the distributor out.

Once you have the new PIP module installed in the bowl, you have to press the drive gear back on the shaft and re-install the pin that holds it in place. If you don't have a press of any kind to get the drive gear back on the shaft, you need to get a very large nut or old bearing you don't want to help install it. Put the drive gear on the shaft and then put the large nut or bearing over the shaft on top of the gear. Now you can smack the nut/bearing with a hammer to drive the gear back on the shaft without damaging the gear.

That's the basics of it. Knowing that, you can decide if you want to tackle the job yourself, pay a shop to do it for you, or buy a different distributor to drop in.
__________________
MLC Stang
http://www.allfordmustangs.com/forum...er_offline.gif http://www.allfordmustangs.com/forum...ons/report.gif
mxndemon is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162