Question about 1990 Ford F150

1 Answer

No data from ecm

Truck runs very rich check engine light is on but can not get any data from otc

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 373 Answers

If no comunication with the escanner ,
1 of the problem can be a bad ECM.
I have replaced lots of them for this problem.
2 can be a bad MAP sensor. or TPS sensor.
You can try to get manual codes fro this truck. Is possible OK.

Posted on Jul 03, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

02 f150 5.4 runs ruff after it warms up


Check the throttle plate for varnish or carbon build up , clean with throttle plate cleaner . Have engine sensors scanned with a scan tool ,mass air flow sensor may be dirty . I'd tell you to check fuel trims with scan tool but you are probably not familiar with these . They show how much fuel the engine computer is adding or subtracting . Great diagnostic tool for trouble shooting engine running problems . Also a scan tool is great to check O2 sensor switching rich to lean an back to rich signal . The engine runs in open loop when cold which means the PCM doesn't look at O2 sensor data till warmed up . PCM/ECM adds more fuel till warmed . Then it will go into closed loop fuel control , the PCM/ECM watches O2 sensors . May have a vacuum leak ,check with can spray carburetor cleaner ,spray around the intake manifold an listen for the engine RPM to pick up or may even stall the engine. Understanding Short Term and Long Term Fuel Trim

Dec 06, 2015 | Cars & Trucks

5 Answers

Alternator change 2001 tdi


remove the unit from the power for one or two hours

and it will get reset

Oct 16, 2008 | 2001 Volkswagen Golf

1 Answer

What does code F80 mean on a 1987 Cadillac Deville?


it is f.8.0,
F.8.0 is BCM data , it shouldn't even show up until ecm codes have been displayed

F80 NO such code
Answer
E80 = Fuel system is RICH.

http://www.engine-light-help.com/cadillac-check-engine-light.html

without knowing what happens when you get that code or why you got that code or on what did you get that code,we can only speculate and run in circles trying to find an answer

Jun 29, 2015 | Cadillac Cars & Trucks

2 Answers

Symptoms of bad oxygen sensor


Check engine light, running extremely rich or lean,bad gas milage....

Apr 24, 2014 | 1989 Lotus Esprit

1 Answer

The engine light comes on, mechanic states that the car reads that it is running rich why


You need a better code reader, ie "Mechanic". The ECM should control "Running rich or lean". Is engine light? Quote, Service SOON or Service NOW. SOON is usually minor, but needs to be found in the codes. "NOW" need to be checked immediately.

Nov 09, 2013 | 2008 Chevrolet Impala LTZ

1 Answer

My 1994 Cadillac Seville is running excessively rich.


I guess my first question would be, is the check engine light on ?
If the fuel system is too rich the O2 sensors should be reporting that to the computer. There could be a trouble code that would point you in the direction of the problem.
Otherwise, it could be a weak injector, or a wiring problem that is keeping one or more injectors grounded.
Are all of the spark plugs fuel fouled ?
No problems with the air filter and intake ?

Apr 16, 2013 | Cadillac Cars & Trucks

1 Answer

02 civic not running after a/c compressor replacement? hook up a otc scanner to it, no data.


CHECK AC COMPRESSOR CLUTCH COIL WIRE CONNECTOR HOOK UP.IF AC COMPRESSOR CLUTCH COIL WIRE CONNECTOR HOOK UP WRONG OR WIRE HAS A SHORT IT WILL BLOW THE ECM FUSE AND AC COMPRESSOR FUSE.CHECK FUSES AND AC COMPRESSOR WIRES.

Aug 30, 2011 | 2002 Honda Civic

1 Answer

What is code p1133


DTC P1133 O2 BANK 1 SENSOR 1 TOO FEW TRANSITIONS
Circuit Description
The powertrain control module (PCM)/engine control module (ECM) constantly monitors the oxygen sensor (O2S 1) activity for 100 seconds . During the monitor period, the PCM/ECM counts the number of times that the O2S 1 switches from rich to lean and from lean to rich. With this information, a total for all switches can be determined. If the number of switches is too low, DTC P1133 will set. The lean-to-rich and the rich-to-lean are greater than 18 switches.

Conditions for Setting the DTC
  • DTCs P0106, P0107, P0108, P0117, P0118, P0121, P0122, P0123, P0131, P0132, P0134, P0171, P0172, P0201, P0202, P0203, P0204, P0300, P0336, P0337, P0351, P0352, P0402, P0404, P0405, P0406, P0443, P0506, P0507, P1130, P1404 and P1627 not set.
  • Engine is operating in closed loop.
  • Purge D.C. is greater than 0%
  • Engine coolant temperature (ECT) is above 72 °C (162 °F) .
  • The engine has been operating for at least 120 seconds .
  • Calculated airflow is between 9 and 42 grams/sec .
  • Canister purge duty cycle is greater than 2%.
  • Engine speed is between 1600 rpm and 4000 rpm .
  • 0 second delay after conditions are met.
  • Airflow is between 7 and 40 g/sec .
Action Taken When the DTC Sets
  • The PCM/ECM will illuminate the malfunction indicator lamp (MIL).
  • Open loop fuel control will be in effect.
  • The PCM/ECM will store conditions which were present when the DTC was set as Freeze Frame and in the Failure Records data.
  • A history DTC is stored.
  • Coolant fan turns on.
Conditions for Clearing the MIL/DTC
  • The PCM/ECM will turn the MIL off on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
  • A history DTC P1134 will clear after 80 consecutive warm-up cycles have occurred without a fault.
  • DTC P1133 can be cleared by using the scan tool CLEAR INFO function or by disconnecting the PCM/ECM battery feed.
Diagnostic Aids
DTC P1133 is most likely caused by one of the following items:
  • Fuel Pressure - The system will go rich if the fuel pressure is too high. The PCM/ECM can compensate for some increase. However, if it gets too high, a DTC P1133 may set. Refer to "Fuel System Diagnosis".
  • Leaking injector - A leaking or malfunctioning injector can cause the system to go rich.
  • Manifold Absolute Pressure (MAP) sensor - An output that causes the PCM/ECM to sense a higher than normal manifold pressure (low vacuum) can cause the system to go rich. Disconnecting the MAP sensor will allow the PCM/ECM to set a fixed value for the MAP sensor. Substitute a different MAP sensor if the rich condition is gone while the sensor is disconnected.
  • Pressure regulator - Check for a leaking fuel pressure regulator diaphragm by checking for the presence of liquid fuel in the vacuum line to the pressure regulator.
  • Throttle Position (TP) sensor - An intermittent TP sensor output can cause the system to go rich due to a false indication of the engine accelerating.
  • O2S 1 contamination - Inspect O2S 1 for silicone contamination from fuel or improper use of RTV sealant. The sensor may have a white powdery coating and result in a high but false voltage signal (rich exhaust indication). The PCM/ECM will then reduce the amount of fuel delivered to the engine causing a severe surge or driveability problem.

Dec 03, 2010 | 1999 Daewoo Nubira

1 Answer

2004 suzuki verona check engine light on. Mechanic said nothing was wrong. car stopped accelorating on highway and died. now was told cataletic converter was clogged and blew engine. can this happen. was...


your engine is fine. find a new mechanic.

if the exhaust clogs it just dies. your cat ( converter) probably clogged due to a very rich condition, which was detected by the computer, hence the light. my bet is a clogged fuel injector or a sensor (either oxygen or air flow) failed. this made it run rich and the cat probably melted.

get a new cat installed, have them run the codes.

Oct 06, 2010 | 2004 Suzuki Verona

1 Answer

98 gm blazer has black soot from muffler giving code insufficiant switching o2 sensor bank 1 and 2 any ideas ?


Your Jimmy is running rich, air fuel ratio is not correct. Start with cleaning your MAF sensor, a dirty MAF sensor will cause your engine to run rich or lean, other causes would be a faulty fuel pressure regulator. Start with the simple and to common and try cleaning your MAF sensor, you can pick up a can of MAF sensor cleaner at most auto parts store like Auto Zone or Part Source.
Also make sure your engine is running at the proper operation temperature 190", cold running engine will cause the ECM to run your engine rich. Causing the back soot and fouling up your spark plugs and intake ports with carbon.
The ECM was programed to recognize the 4.3 vortec to run at 190" and anything cooler will cause it to run rich and poor on economy.
Thank you for using fixya and good luck.

Apr 27, 2010 | 1998 GMC Jimmy

Not finding what you are looking for?
1990 Ford F150 Logo

Related Topics:

108 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

64052 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Fordexpert

Level 3 Expert

5331 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...