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Anonymous Posted on Jan 13, 2011

I wan ask about waja 1.8 .this is my uncle car .he car cant start.it can crnk but cant start. i check that key sensor that no current at red color wayar .

  • majid wahab
    majid wahab Jul 01, 2015

    time to replace your cobra immo if u sure there are no blinking red light on immo touch key pad.

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johnny rebel

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  • Renault Master 10,875 Answers
  • Posted on Jul 01, 2015
 johnny rebel
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When the anti theft system was created,the dealers forgot to tell the new car buyers about how much the fob matters to the vehicle,without it,owners are stuck,your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.if you lost your fob or never had it,whatever,you need to have the exact fob that came with that car from the factory,the key and fob have a chip in them that only go to that certain car,if you do not have it,then you need to buy a new one from the dealer or ebay and then you need to contact your dealer about programming the fob to your car,you might not have to have it towed if they have the documents from the car,the only other way is to get a junk car,with the steering column,key,fob and all computer boxes and door locks and switch them,i just did that with a 98 dodge dakota,and it works.

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0helpful
1answer

2002jeep 4.7 dont have proper voltage at map sensor wiring good changed ecm still nothing

02 GC 4.7L V8. KEY ON< or RUNNING? we cant guess that.
why not post the symptoms, so we can REALLY HELP YOU.
GOT DTC's what are they,. scan it yet, if not?, why not scan it.?
my guess is you are working FSM free? none.?
MAP. (manifold air pressure or BARO) top front of intake plenum man.

2 fuses drawing, what does that mean?
all fuses draw current.
why not post symptoms, ???????????

the fsm shows the MAP readings and vacuum and voltage output
chart, the MAP is BARO SENSOR, CALLED A 1 BAR BARO.
in simple terms it measures plenum vacuum and the PCM injects
based on that and on IAT plenum air temperatures.
with 2 sensors this engine measure AIR flow through the system.


the PCM creates 5vdc called 5vREF. The PCM has a regulator inside
the PCM to creates 5v, for the 4 external sensors.
TPS, MAP, Crank and Cam sensors. all run off 5vdc power.

YOUR map has 3 pins,
1 blk /Lb is ground from PCM. (black, light blue?)
2- output color DG/RD (darkgreen-red) bingo, sensor output.
3- orange, 5vdc all time key on.

weather and altitude changes MAP readings. ask for the rules.

Baro means barometer.
its and electronic barometer. or Baro for short.

here is cheat sheet (HG is standard mechanics, vacuum tool called relative vacuum )
The voltage is inversely proportional to Vacuum. (relative)
HG " volts. (DMM backprobing conn.)
0 = 4.8v
5 = 3.9v
10 = 3.1v
15 = 2.1v
20 = 1.1v
up to
hard
vacuum
28"HG = 0.5 (radical deceleration, in gear, throttle cut, down hill)


http://troubleshootmyvehicle.com/chrysler/3.9L-5.2L-5.9L/how-to-test-the-map-sensor-2

do not use my numbers as verbatim, get your own FSM
and see the chart for your sensor on your engine.

keep in mind the ECU provides the ground to this sensor.
so measure ground on the sensor to the battery, minus.
should be less than 0.5vdc.
then measure 5v, on the 5vdc pin, yes, good.
then output,
this is the correct order, sensors can not run, with bad power.
period.

does engine run?
dose enigine pull (hand gauge) 20"HG it idle, if way lower, there can
be burned intake valves.. if the vacuum pulsed badly that too
is bad valves. the ECU can not run a bad engine., not that bad.
The ecu can only compensate for normal wear, not dead cylinders.
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you need to go to dealer. they will program your key or give you a new one. you cant use someone elses because its already cut.
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test the ignition coil see the instruction attached AND fix it.
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It wont start but it does turn over and the plugs are firing

check fuel pump presure,if it checks out crnk and cam sensor may be the problem
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ck your drive belts , also yes the idle is controlled by a bypass air motor , ecm controlled , so is your car cranking over or spinning no run , broken drive belt or bad alternator , cranks over no start could be many things , no fuel pressure , no spark , timing belt failure ect
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