What codes 12. 33. and 35. mean on a 1991 Jeep wrangler 2.5L?

in NO ORDER !
the stickers must match , do not guess.
ebay,? '
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.X1991+jeep+wranger+ecu.TRS0&_nkw=1991+jeep+wranger+ecu&_sacat=0


or any auto store that sells CARDONE rebuilds.
Cardone does not sell direct, see the full lest of ECU? only 4 and must match yours.

http://www.cardone.com/find-parts/vehicle-parts-listing?make=Jeep%20Trucks&model=Wrangler&year=1991


yes your code 55 is dead. ecu is dead.

or car-parts.com


http://www.car-part.com/cgi-bin/search.cgi


warning there are
2.5L, USA FED< USA CALIF and CANADA ECU and may be for transmissions. (match the numbers (sticker #)
it does not need programming.

jeeps shows, not in stock. NIS,NLA

posted now 3 times why not just do one post,

answers;
yes, yes and yes.
easy no
where,
well the CKP in on the bell housing at flywheel edge with 3 wires.
CMP is in the base of the distributor cam sync its called, and has small wires exiting the distrubutor and is there.

the ECU is on the fire wall next to brake mc

you fix cars, but are not electric savvy
and no mitchells account,
you cant fix cars lacking those documents.
i see you use fixya to avoid books,
are we your only eyes to books,????

There should be a sticker in the engine compartment that shows the routing and you should be able to hold the tensioner back with a 3/8's ratchet with a long handle.

If, when you turn on the ignition, you do not see the check engine light come on in the dash then your ecu is in need of repair. The ecu has to energize the relays that send power to the fuel pump and injectors. Until that check engine light comes on, no power will be sent to the relays, thus no start. There are a lot of posts on this site about this, called the delayed start check engine light problem.

You don't need a scanner. If you cycle the key off and on 5 times, the codes will start flashing. Here is a link to jeeps and their trouble codes. There aren't that many in the older OBD-1 systems.
https://www.2carpros.com/articles/retrieve-trouble-codes-for-chrysler-dodge-plymouth-odb1-1995-and-earlier-car-mini-van-and-light-trucks

If you have no trouble codes, check fuel pressure. Multiport injection is high pressure, above 40psi, but Jeep would have specs.

code 12 is a normal code when the engine is not running. it means there is no distributor reference. When this code flashes during the key cycle, it is normal.

It could be as simple as a loose fitting gas cap.
Turn the key on and off 3 times, on the 3rd time leaving it on.
Depending on your system, if you have a digital odometer, an error code will be displayed.
If that doesnt happen, the engine light will start flashing. Start writing down how many times it flashes per interval. It may flash 3, then stop, then flash 4, then stop, and finally flashy just two times. This means it is number 342.
Get online and look up error codes for your vehicle and match it up.

there is a short in the wire going from the gauge to the tank. ck the wiring under the truck from the tank going forward, and ck if anything looks like its rubbing on the wiring harness.

Put the key in the ignition and turn it on and off (3) times without starting the jeep, leaving it in the on position count the (1) flashing indicator Light, Eg: (5) flashes, Then there will be a pause, then it may flash (3) times, this is a code #53. Keep your Eye on them and write them down. If you should miss (1) Repeat as many times as needed, Info: A #55 means there are no codes!!

your jeep showed the done message because as im sure you were turning the key on and off to try to start the car this also the method of doing the self check of the diagnostic trouble codes(DTC) and it prompts done when it is finished displaying the DTC's