 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / June 200695 Corolla starting problem
It started as an intermittent problem. Occasionally I had to crank several times to start. Once it is started it runs well. This happened when the engine is hot as well as when it is cold. Now it got worse and does not start when I crank. The engine turns. When I spray starter fluid to the air cleaner and then crank, it starts and runs for a second or two and then stops. There is fuel in the tank. Battery is new and charged. Fuel filter is new. Checked most of the sensors and they seems to be ok. Swapped the ECU and there is no change. When the switch is put to on I don't hear the fuel pump working. Haynes manual says it should get power for about 2 seconds when the switch is put to on position. When it is turned to start --crank-- I hear the fuel pump working when the engine turns. I measured the voltage to the fuel pump. When the ignition switch is put to 'on' there is no voltage to the fuel pump. I tried it several times by switching to on and back. When the ignition is turned to 'start' there is power to the fuel pump for about 2-3 seconds while the engine cranks. When I let the car stand for about 30 mins without starting, and then crank, it runs for a second or two and stops. Immediately after that when I crank it does not start at all. Looked at the spark plugs after cranking and they seem dry. Any suggestions? > It started as an intermittent problem. Occasionally I had to crank > several times to start. Once it is started it runs well. This happened [quoted text clipped - 19 lines] > Looked at the spark plugs after cranking and they seem dry. > Any suggestions? Sounds like it might be the fuel pump since you can't hear any noise from it when you turn the ignition switch to the on position. Fwed I can hear the fuel pump when I turn the key to 'start' position. Could someone confirm if I should be hearing the fuel pump when I turn the key to 'on' without going to 'start'? I checked the voltage to the fuel pump. When the key is inserted and turned to 'on' the fuel pump does not get any power. It gets power when the switch is turned further to 'start' from the 'on'. (i.e. Fuel pump is activated only when the engine is cranking) Is that the normal behavior? If it is not: If the fuel pump should get power when the key is turned to 'on', which part should I be checking next. I have tested the EF1 main relay and the Circuit opening relay according to the haynes manual and they are ok. i.e I removed the relays and applied power to them and checked if they make contact, and they did. > > It started as an intermittent problem. Occasionally I had to crank > > several times to start. Once it is started it runs well. This happened [quoted text clipped - 24 lines] > > Fwed >I can hear the fuel pump when I turn the key to 'start' position. Could > someone confirm if I should be hearing the fuel pump when I turn the [quoted text clipped - 38 lines] >> >> Fwed If you suspect the fuel pump, rather than checking the current to fuel pump, I think you should be checking the fuel delivery--i.e., fuel pressure at the injectors. If it's good, forget the pump & move along the guessing game. Or check for codes. s Try swapping the fuel pump relay with another one of the same part# (there's usually several of the same in the area where they are) and see what happens.  Signaturejeffcoslacker http://www.automotiveforums.com Thanks for the suggestion. I checked the relays EF1 and Circuit opening relay. I checked the voltage coming to those relays too. They are all ok. I took out the relays and checked them by applying power to them they worked. I tested according to the procedure given in Haynes manual. Since the fuel pump gets power and I hear it when I turn the key to 'Start', those relays must be working. > Try swapping the fuel pump relay with another one of the same part# > (there's usually several of the same in the area where they are) and [quoted text clipped - 7 lines] > > http://www.automotiveforums.com > Thanks for the suggestion. I checked the relays EF1 and Circuit opening > relay. I checked the voltage coming to those relays too. They are all [quoted text clipped - 8 lines] >> -- >> jeffcoslacker Well it sounds now like the fuel pump is doing what it should.... are you getting spark to the cylinders? Just out of curiousity... when was the last time you changed your air filter? Fwed Thanks for the suggestion. I checked the relays EF1 and Circuit opening relay. I checked the voltage coming to those relays too. They are all ok. I took out the relays and checked them by applying power to them they worked. I tested according to the procedure given in Haynes manual. Since the fuel pump gets power and I hear it when I turn the key to 'Start', those relays must be working. > Try swapping the fuel pump relay with another one of the same part# > (there's usually several of the same in the area where they are) and [quoted text clipped - 7 lines] > > http://www.automotiveforums.com Does it mention anything about a "cold start injector" or injector timer in the manual? Some Toyotas had this... Signaturejeffcoslacker http://www.automotiveforums.com The manual does not mention "cold start injector". I think 95 Corolla does not have these. The air filter is clean and about 6 months old. > Does it mention anything about a "cold start injector" or injector timer > in the manual? Some Toyotas had this... [quoted text clipped - 6 lines] > > http://www.automotiveforums.com The fuel pressure is good. Yesterday I sprayed starter fluid to the air filter area and cranked. It ran a little and stopped. Restarted just after that and it didn't start. Then after waiting for about 20 mins I just cranked again and it started. I left it in the idle for about 5 mins and then touched the accelerator pedel to give more gas. Then it stopped. After that I cranked but it didn't start. Today morning I cranked without spraying any starter fluid and it didn't start. Any specific sensor that is critical for the starting of the motor? I can test them or swap them if I know the likely ones. > The manual does not mention "cold start injector". I think 95 Corolla > does not have these. [quoted text clipped - 9 lines] > > > > http://www.automotiveforums.com The problem was a grounding wire that carries pulses to the fuel injectors. It was fixed and now the car starts and runs fine. > The fuel pressure is good. Yesterday I sprayed starter fluid to the air > filter area and cranked. [quoted text clipped - 21 lines] > > > > > > http://www.automotiveforums.com |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.