Question about 1994 Toyota Supra

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My car will start but will not run, unless i hold the troddle wide open.

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Mass air flow sensor

Posted on Oct 24, 2008

If it is a turbo model then try the TPS module

Posted on Jul 27, 2008

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Naturally asperated or Forced Induction? aka No Turbo or Turbo?

Posted on Jul 21, 2008

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1 Answer

Had a p305 on my 2005 buick rendezvous engine light is on changed the coil pack. it still hard to start unless i mashed the gas. it stalls at the light


Starting Mode
With the ignition switch in the ON position, before engaging the starter, the PCM energizes the fuel pump relay for 2 seconds allowing the fuel pump to build up pressure. The PCM first tests speed density, then switches to the mass air flow (MAF) sensor. The PCM also uses the engine coolant temperature (ECT), the throttle position (TP), and the manifold absolute pressure (MAP) sensors to determine the proper air/fuel ratio for starting. The PCM controls the amount of fuel delivered in the starting mode by changing the pulse width of the injectors. This is done by pulsing the injectors for very short times.
Clear Flood Mode
If the engine floods, clear the engine by pressing the accelerator pedal down to the floor and then crank the engine. When the throttle position (TP) sensor is at wide open throttle (WOT), the PCM reduces the injector pulse width in order to increase the air to fuel ratio. The PCM holds this injector rate as long as the throttle stays wide open and the engine speed is below a predetermined RPM. If the throttle is not held wide open, the PCM returns to the starting mode .
You could have a dirty or bad mass air flow sensor .
You could have

Mar 25, 2016 | Buick Rendezvous Cars & Trucks

1 Answer

How do you put a gmc jimmy s15 2.5 1987 troddle body in after it's took out i need to know were the o rings go and the filters


Looking down at the tbi there are 2 screws holding the injectors in place, remove them then remove injector ,a oring goes around each injector

Dec 02, 2014 | GMC Cars & Trucks

1 Answer

Can not get my 1991 gmc to start hot or cold unless foot right to the floor. Why


you said everything is changed out ( i assume this includes the computer or at least the hypertech chip upgrade ) if a chip upgrade was done you will find that one of the pins has been bent over and is not making connection, repair this chip, then try again .

May 27, 2014 | 1991 GMC Sierra

1 Answer

Car only starts when hold wide open then runs ruff any one knows whats up 02 grand am 2.2


IAT intake air temp and the coolant temp sensor both regulate the fuel mixture and if either is bad it will not run smooth and will require holding the gas to get it to start.

Oct 06, 2012 | 2002 Pontiac Grand Am

1 Answer

I have a 1986 gts corrolla that will not run unless air flow meter is held open


Now if your old fuel pump was loosing pressure it tends to lean out Overheating your catalytic converter and melting it so exhaust gasses can't flow To test this is easy just remove the two bolts holding it on the engine pipe Start the engine if runs fine replace cat converter

Sep 15, 2012 | 1986 Toyota Corolla 2 Door

1 Answer

Truck blowing black smoke and stalling i suspect icv what say u


black smoke = running way to rich (unless it a diesel)

if you tell me year make and model could help u more

if carburetor car carburetor may need adjusted or rebuilt

if it TBI could be leaking pressure regulator leaking injectors injectors stuck wide open

if TPI could be bad o rings on injectors injectors stuck wide open

Dec 22, 2010 | Ford Ranger Cars & Trucks

1 Answer

1985 280se wont start unless you have throttle wide open


does it have old fuel how long has it sat and does it have good fuel pressure check filter

Aug 18, 2009 | 1990 Mercedes-Benz E-Class

1 Answer

2001 mercedes c240 has a really rough start but when the car almost dies I turn the car off wait 3 seconds and it starts perfect. Next comes the issue with having to warm it up before driving anywhere...


Gasoline- thank you. Warm up is not an issue like diesel is. Sounds like the choke is is either wide open or over choking. With the engine cold, remove the air cleaner and note where the plate is at the opening of the carb. If it is wide open then without touching anything else and engine not running, step down on the gas pedal and see if the choke plate reset itself to restricter the carb inlet. If it didn't, then take some WD 40 and spray the linkages and the rod ends holdin the choke plate.By hand work the plate and linkage holding the gas open at the carb. Then set the plate to wide open and do the gas pedal thing agan to see if choke sets itself back to restricting the carb intake. If it does, start the engine and as the engine warms upm the choke plate should start opening on its own and you are off and running. Roitine question. Is your air cleaner clean? If the choke plate needs adjusting. get back to me. K? Good luck Remember to press the gas pedal down once before cranking. That sets the choke for cold start. Hope this helped you Good luck Note, the WD40 won't hurt anything but avoid spraying with engine running or when engine is hot..

May 12, 2009 | 2001 Mercedes-Benz C-Class

1 Answer

1993 chevy 1500 starting problem


I think your engine has a vacuum leak, check all of your hoses, and carb fittings.
If your engine cannot get enough vacuum it will not be able to draw enough fuel to run.

Jan 19, 2009 | 1993 Chevrolet K1500

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