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Good afternoon 157 - Mass airflow sensor fault. Low voltage. 158 - mass airflow sensor fault. High voltage. The EEC has not received a MAF sensor readings. Power and signal are out of limits . Check the connector connector for damage, corrosion and or security. A voltage test might be in...

Good afternoon Check the condition of the DIS harness. Years of exposed wiring, and pulling/twisting at the connectors will cause intermittent signals to DIS/EEC. Check the clearance between the DIS harness and the supercharger belt. I used the EVTM to find a 1991 and 1992 DIS harness...

Good evening Test step 12-32, page 105 Test step D2b. Do not apply power.

Good evening With everything connected does the pump run more than 60 seconds and both the Anti-Lock and Brake warning light on? If so the replacement pump (salvage yard if I understand post #19 ) may be suspect. Check Pump for amp draw over 25. Connect clamp amp/voltage meter to battery...

Good afternoon Is the ignition switch serviceable (not separated)? Attempt engine start with starting fluid. If successful suspect/inspect engine fuel system. May have to have the rear of the car elevated and supported for the next step. Have someone take a mallet and continually...

Good morning As KMT stated get codes. Is the EEC stock or chipped? Is the Cam shaft sensor connector harness rubbing against the supercharger belt? Is there any harmonic balancer pulley wobble while running? Any visual damage to the Crank sensor harness? Get a fuel pressure gauge and...

Good afternoon You can use this article as a visual guide. https://www.tccoa.com/threads/1989-1997-thunderbird-fuel-pump-upgrade.191043/

Good evening Problem could be a broken 4r70w overdrive servo snap ring. Has the transmission been serviced recently?

Good evening Have you used search on this subject? http://www.sccoa.com/forums/showthread.php?t=59901

Good morning Another area to suspect is the teves ii reservoir to pump hose. Due to time and heat cycles the original hose badly cracks internally causing leaking. A good indicator is evidence of brake fluid on the firewall and proportional valve...

Good morning Separate the steering column cover (attached with three screws) and check the following: Ignition switch half's separation. Ignition switch connector for security of tabs and wire terminals. https://www.rockauto.com/en/moreinfo.php?pk=944294&cc=1140387&pt=4700...

Good evening From past posts on long term storage and attempting an engine start problem(s) are in general identified to the following subjects: Power/Ignition. Fuel/Fuel Pump/Filter. Fuel Injectors. EEC. Grounds. Here is an informative and very entertaining recording of such an event...

Good evening As Dough H stated suspect the alarm module. Troubleshot a 1993 auto with a issue similar to yours advancing to the point of horn/light flashing event. Replaced module to fix problem. Note. I opened the original module to find the circuit card lightly covered with dust. Open...

Good morning If the dealer is unsuccessful I suggest getting a Motor Craft ignition lock. Comes with keys. https://www.rockauto.com/en/moreinfo.php?pk=386647&cc=1140387&pt=10041&jsn=904 Ask your locksmith if it is possible for you to remove the door lock cylinder and bring it to their...

Good afternoon Without the year specific factory service manual (1993 Thunderbird/Cougar specifically group 11-02-15 Diagnosis and Testing) and EVTM you will be in "cannon parts fodder" zone with one or more of the following components: Primary junction box. Secondary Junction box...

Good afternoon Did you replace the sway bar bushings along with the sway bark links? https://www.rockauto.com/en/moreinfo.php?pk=1281828&cc=1140602&pt=7624&jsn=621 If you just changed the strut only suspect the strut mounts/bump stops. This does not apply to quick strut assembly. Check the...

Good afternoon You can verify with the connector face/ pin out charts Thunderbird/Cougar EVTM 1992 - 1993. See attachment below. https://www.tccoa.com/threads/the-speedometer-cluster-thread.138760/

Good afternoon Did you check the following? Battery voltage prior to start. Check coil pack connector for security/corrosion. Check for spark. See youtube scannerdanner attachment. Engine harness ground on the back of the driver side cylinder head for corrosion or security. Add fuel...

Good morning You will need year specific Thunderbird/Cougar factory service manual; Steering System Power Electrical Component Diagnosis and Testing.

Good afternoon DIY project or a repair shop? If a repair shop I would expect $1K+ parts and labor. https://www.cashcarsbuyer.com/rear-main-seal-replacement-cost/ How bad is it leaking?