Intermittent stalling on warm starts, No issues with cold starts. |
Intermittent stalling on warm starts, No issues with cold starts. |
May 17, 2017 - 4:11 PM |
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Enthusiast Joined Jan 20, '09 From Winnipeg Currently Offline Reputation: 5 (100%) |
Hey guys, looking for some advice on an issue that arose on my car. Ill start off by saying its a 95 GTS (Canadian car) with a 5sfe. Motor is completely stock aside from a short ram intake, which I've just replaced with the factory air box.
From time to time, when the car is warm, it'll give a tough time starting. Ill start the car up cold and it gives no issues, drive it untill its up to temperature, and then turn the car off. I'll let it sit for 10-20 minutes, come back and the car will give difficulty starting. It'll fire up to about 1000 RPM (regular idle) and then drop right back down to 0. If i give it some throttle I can get it to run if i hold the RPM at idle for 30 seconds or so, and then it runs and drives fine. However if I don't give it throttle it just stalls out again. This problem is also very inconsistent, majority of the time it will start and run fine, but when it does give me problems, its always under these circumstances. It occurred once this week where i had to give it a significant amount of throttle(1/4 to 1/2) to force it to start, and then held it at idle for 30 seconds or s, and then it idled fine. I posted this on the facebook page, and also did some researching on other toyota forums, and have a very very rough idea what could be causing this, and I'm hoping someone could provide some insight as to what could cause this. Its a difficult thing to diagnose, as it doesn't happen extremely frequently, but I'm also hesitant to drive it, as I don't want to get stranded somewhere with a vehicle that doesn't start. Any help or advice would be greatly appreciated. -------------------- -Protection mode, For when your amp tries to blow its load. 1995 Toyota Celica GTS - Daily Driver 1999 Chevy Cavalier - Winter Beater 1994 Honda Civic CX Hatchback - Dead My Celica! |
May 18, 2017 - 2:41 PM |
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Enthusiast Joined Feb 23, '12 From Warrior, AL Currently Offline Reputation: 0 (0%) |
The engine coolant temperature sensor:
You would need to measure resistance across a range of temperatures, can do it with it in the car still. Just do it with it cold and then up at operating temperature, just have to find the resistance values out of the service manual. The ignition coil will be connected to the center ignition lead off the distributor cap, to actually test it you'd need to find the testing procedures from a Toyota service manual to get the proper resistance readings. Normally you measure resistance of the coils but if I recall correctly the ignition coil on my 7A was sealed in epoxy so I'd imagine it'd be the same for the 5S. The easiest way at that point would be when it doesn't want to start pull a plug out and put it against the intake manifold and have someone crank it and see if it sparks weak or at all. As far as the cap and rotor goes you're just checking for corrosion or burns on the contact points. Usually a MAP sensor acts up all the time but it could be tested as well. Let me try and find testing procedures for everything. -------------------- 2001 Miata LS 5-speed
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