Question about 1993 Toyota Pickup

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93 toyotapickup Afm flapper don't open ? If I open it it will allow fp to run ! Which is the first problem I started with! Is it bad or needs cleaned

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The pure mechanical AIR METER< VAF, volume air meter
it's just a hinge and flap and a pot (variable resistor)
if it don't move its bad. jammed, how to unjam one, depends
on how or what jammed it. (fate)
sure clean it, use CRC MAF cleaner whats; to lose? and all to gain.

if it can move, then the ECU cant measure air, and thus not inject
the correct fuel.

the ecu reads air flow, and adds fuel to match.
its that simple.

Posted on Nov 07, 2014

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What is an AFM flapperneed to be specific as to what you're talking about

Posted on Nov 07, 2014

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1 Answer

How to know that the fuel pump relay has when bad in my 1985 toyota gts celcia. i hve replaced the fuel pump with a new one


OPEN THE AFM COVER SHORT PIN 1 AND 2. THIS IS THE PUMP SWITCH. TURN IGNITION KEY TO RUN POSITION. YOU SHOULD HEAR A WHIRRING SOUND FROM THE PUMP IN THE GAS TANK.
ALSO CHECK FUEL PUMP RELAY

Mar 23, 2014 | 1985 Toyota Celica

1 Answer

93 toyota pickup 4x4 it will stay running after I turn it on to start it up, it starts up then after a few seconds it kills


if I'm reading this right...
... the engine starts and dies within a few seconds.
... you jumpered the fuel pump test connector and it will keep running.
... you smell fuel after trying to re-start when it dies.

Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.

Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


It does sound like an AFM or COR issue considering it dies after a few seconds, but the fuel smell when trying to restart the engine may be a separate issue that needs corrected / isolated first.it will keep running.

... you smell fuel after trying to re-start when it dies.


Disconnect the plug to the cold start injector. Even if you have an issue with the engine running then dying after a few seconds after doing this, if you don't smell fuel after disconnecting the cold start injector and try to restart it, the cold start time injector time switch may be failing.


Buy a can of starting fluid and have someone start the engine then spray short bursts of the fluid around all the intake fittings. If spraying the fluid in any particular area keeps the engine running, I'd start looking for leaks around that area.


It does sound like an AFM or COR issue considering it dies after a few seconds, but the fuel smell when trying to restart the engine may be a separate issue that needs corrected / isolated first.

Mar 30, 2013 | Cars & Trucks

1 Answer

Ford focus will not start - ticking over like normal but no fire up. Put on diagnostic and coming up with PO232 Fuel pump secondary circuit - any ideas what to do next ?


you can try this:
It is possible with a P0232 for the fuel pump to be running continuously, even with the ignition off. If that's the case and you can hear the fuel pump running, you may be able to disregard some of the following checks. Turn the KOEO (key on engine off) and wait for a few seconds. This allows the PCM to complete it's fuel pump pre-cycle. Now, using your scan tool (if you have one) observe the FP VOLTAGE FEEDBACK reading in the datastream. This reading indicates what kind of voltage the fuel pump is receiving.
If you don't have access to a scan tool, use a voltmeter to read the FP voltage at the fuel tank. If your reading shows any voltage at all present to the fuel pump with KOEO (or if you can hear the pump running), remove the FP relay. If the voltage remains, or the fuel pump continues to run, then there is a short to voltage on the FP voltage supply circuit or on the feedback circuit. Repair as necessary. If the voltage disappears (or the pump quits running) with the FP relay removed then try replacing the relay with a spare one. Upon reinstalling the spare relay, if the voltage disappears, the relay was faulty due to a short. If, though, after replacing the relay voltage is still present, suspect that the PCM FP relay control circuit is shorted to ground.
Check for a short to ground on the PCM FP relay control (ground driver) circuit by removing the FP relay and ohm between a good ground and the PCM FP relay control. There should be no continuity to ground with KOEO (after the FP pre-cycle is completed). If there is continuity to ground the wire is shorted. Find the short to ground and repair as necessary. If you can find no physical short, It may be necessary to snip the FP relay control wire close to the PCM connector where it will be easy to repair and check for continuity to ground with KOEO coming OUT of the PCM. If there is no continuity the wire is shorted in the harness. But if continuity exists, the driver may be internally shorted to ground and the PCM may require replacement.

Jul 28, 2011 | 2000 Ford Focus

1 Answer

93 Jimmy with 4.3 vortec, Won't start, no spark. Changed cap, rotor, coil and ignition module. What would be the problem.


Have you checked your fuel pressure? Can you hear your fuel pump buzzing. Remove your gas cap and have a helper turn the key to the run position while you have your ear close to the open tank. If you don't hear anything you have a fuel related issue. Even if you hear the pump buzzing you need to check the fuel pressure as it may not be making enough pressure. If no buzz you may have a bad fuel pump, pump relay, or wiring problem to the pump. That is where I would start.

Apr 22, 2011 | 1993 GMC Jimmy

2 Answers

Changed termustate and flushed radiator and toped it off still showin lowcollant and blowin cold are out heat


If you have a low coolant light, this would be a bad sensor, either at the radiator, or the coolant reservoir. need to replace it. as for the heater, well there are a couple of things to check. first,start the car, and let it warm up. now the engine is at running temperature, now turn on the heater(trust me), and let it run for about 2 minute. feel the 2 lines going to the heater core( they are on the passenger side going to the firewall) is the one coming from the engine getting warm, or hot. If not, there is a valve that allows hot coolant to the heater core. change this valve(they do go bad, or just get stuck), this is an easy fix. If the line is getting warm or hot, the problem will be the heater core, and will need to be replaced. hope this helps and please rate this, helpful to you or not

Jan 25, 2011 | Buick Riviera Cars & Trucks

1 Answer

2000 Subaru Legacy will not start


If you find that the engine is dying at intersections and runs a rough and fluctuating idle at start up, and you also sometimes lose power even though the engine is running then it is probably your Air Flow Meter or sometimes reffered to as a Mass Airflow Sensor. Eventually, as the AFM deteriates further you will no longer be able to start the engine as the ECU can no longer get accurate flow readings to work out air fuel ratios and shuts it all down to stop damage occuring. 2 ways to fix, replace AFM or upgrade your ECU to one that is capable of running MAPs for air fuel ratio, rather than using a sensor. Hope this helps.

Mar 20, 2009 | 2000 Subaru Legacy

1 Answer

No RPM past 2000.


Sounds like a faulty airflow meter.When there is a fault with the AFM it goes in what you call "limp mode" which enables you to get home without damaging your engine. If you know some one with a similar or same car try their AFM to check before you buy one.Hope this helps.

Jun 26, 2008 | 2007 Subaru Impreza WRX STI Limited Sedan

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