Question about 1985 Toyota Celica
The only thing I haven't replaced is the censor, could that be the problem. I don't know anything else to do to it. please help
Hi there. have you tried purging the fuel line as there could be a air lock in the line.....worth a try..good luck
Posted on Apr 26, 2014
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Posted on Jan 02, 2017
I need to get a clear mental picture of what exactly is happening.
With this said, you stated that the car "runs fine" until warmed up.
Q: When you start the car when cold it idles fine?
Q: If you allow the car to idle until "fully" warmed does the car stall?
Q: As the car begins to warm up, Does the RPM fluctuate abnormally?
Q: Does the car Only stall when you press on the gas pedal or does it stall just sitting and idling in addition to pressing the gas pedal?
Q: If you can drive it while cold does the car stall during acceleration when warm or only at Stop Signs / Lights?
Q: If you wait 20min or so, can you start the car again?
Q: How many miles are on the car?
Posted on Mar 31, 2009
The fuel pump should run for a second or two when you first turn the key on, but then shuts down to prevent the engine from flooding if the computer does not get a signal from the crank or cam sensors which the computer uses to trigger the ignition system. So no spark no fuel. Check to see if you have a spark in the ignition system.
Posted on Aug 28, 2009
You need to check a couple of things. If your car has been sitting, then it could be any of a number of problems. Check to make sure that you have the three things your car needs to run. 1. Air- is the air filter clean with no blockages like mouse nests on the intake side and also in the exhaust pipe!! 2. Fuel- Do you hear the fuel pump kick on for 2 seconds when you first turn the ignition to the run positon? If not, your fuel pump could be suspect. 3. Spark- If you have air and fuel, but no spark, then your ignition system is under investigation. Be methodical you need all 3 of these things for the car to run, without any one them your stuck!
Hope this helps you out!! Try running the car on propane, if it runs beautifully, then you know it's a fuel delivery problem.
Posted on Oct 08, 2009
First of all, never... and i mean NEVER, use starting fluid on a gas engine. You will blow intake gaskets, possibly head gaskets, and even warp the valves, and worse yet, blow your head off. Starting fluid is meant for diesel engines, and nothing else.
The first thing you have to do is listen when you first turn on the key, to hear if the fuel pump is running in the gas tank. If you can't hear it, check fuses and wiring. Make sure there is power to the pump by using a test light. If there is power, and it doesn't work, replace the pump.
Check for spark using a timing light. If there is no spark, check the coil, fuses, distributor, wiring, etc. Aim your timing light at the crank mark, if you have spark, and make sure the mark is staying in one place. If it is jumping around, your timing chain has likely jumped, and will need to be replaced.
If there is an engine light on, you are best off to borrow a scanner if you don't have one, and see what it says. Hit and miss can end up costing much more than the price of a scanner. Good luck.
Posted on Apr 21, 2010
SOURCE: 94 4Runner 6cyl. 3.0 4x4
If the fuel pump operates with with a jumper at data link.That clears that the fuel pump is running.So check the EFI relay and the fuel pump relay. Now what is EFI relay:--- EFI Main Relay The EFI fuse supplies constant battery voltage to EFI main relay. The EFI main relay provides battery voltage to +B terminal of circuit opening relay (some models) and data link connector. Depending on model, EFI main relay may either be turned on directly by ignition switch or by M-REL terminal of Engine Control Module (ECM). The EFI main relay may also provide battery voltage to +B and +B1 terminals of ECM when ignition is turned on. The EFI main relay is located in engine compartment relay box. NOTE: Circuit opening relay is used on all models. Circuit Opening Relay Circuit opening relay controls fuel pump circuit. The Engine Control Module (ECM) receives an input signal at STA terminal when engine is cranking. Starter signal is also applied to STA terminal of circuit opening relay. Starter signal energizes circuit opening relay during cranking. Circuit opening relay then provides voltage to fuel pump or fuel pump relay.The circuit opening relay is grounded by ECM through FC terminal.Fuel Pump Relay & Fuel Pump Resistor .Fuel pump relay receives voltage from circuit opening relay and operates fuel pump. Fuel pump operating speed may be varied by Engine Control Module (ECM). When ECM grounds fuel pump relay, relay contacts close, and voltage is supplied through fuel pump resistor, to fuel pump. This changes fuel pump operating speed. ---------------------- As there are many other possibilities to check out of the mentioned procedure.But as you said fuel pump works with jumper wire and the fuel pump relay is replaced,on as per that i think the problem is the Fuel pump relay connections.The relay ground wire is connected to the ECM.If this wire is not connected properly or if this ground wire is got short or in-case not connected,then the ECM will not send signal to fuel pump relay to get started so it will not let the fuel pump start.But in jumper wire connection the relay is bypassed so no ground connection required and due to that fuel pump works. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation
Posted on Sep 05, 2010
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