Help No Start Trouble Shooting
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Help No Start Trouble Shooting
So, I have an electrical problem with my '87 ford 300.
It will turn over for ever, but it will not fire. I think it's getting fuel, since when I popped the line off I had a pile of fuel come out.
I have replaced the ignition switch, which did nothing. I am now thinking that it is either the EEC relay or the TFI Modual, or maybe the coil, or maybe the fuel pump relay, since I haven't put a gauge on the fuel pressure.
Does anyone have advice on what steps to take to narrow the problem down. None of the parts are really expensive, but I don't really just want to start replacing stuff with out an idea of what is wrong. I am equiped with meters and test lights, so I feel like I should be able to track this problem down.
Thanks,
Blindlightguy
It will turn over for ever, but it will not fire. I think it's getting fuel, since when I popped the line off I had a pile of fuel come out.
I have replaced the ignition switch, which did nothing. I am now thinking that it is either the EEC relay or the TFI Modual, or maybe the coil, or maybe the fuel pump relay, since I haven't put a gauge on the fuel pressure.
Does anyone have advice on what steps to take to narrow the problem down. None of the parts are really expensive, but I don't really just want to start replacing stuff with out an idea of what is wrong. I am equiped with meters and test lights, so I feel like I should be able to track this problem down.
Thanks,
Blindlightguy
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Joined: Oct 2004
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From: Las Vegas
You need Compression, Ignition and Fuel, for an engine to run. Your sure you have fuel, now you need to check for ignition and compression. I would check for spark first since it easy to do. Pull a plug, connect it to the plug wire and crank it over. If you get spark, check compression, if it don't spark check the wires/cap/rotor. I hope this helps.
Kevin
Kevin
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Checking the spark is my next step, but assuming there is no spark I don't really know how to check to find out what componate is not working.
If anyone has any advice on what/ how to check the ignition system I sure would apreciate it.
Blindlightguy
If anyone has any advice on what/ how to check the ignition system I sure would apreciate it.
Blindlightguy
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Joined: Aug 2005
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From: Easton,Ks
Originally Posted by blindlightguy
Checking the spark is my next step, but assuming there is no spark I don't really know how to check to find out what componate is not working.
If anyone has any advice on what/ how to check the ignition system I sure would apreciate it.
Blindlightguy
If anyone has any advice on what/ how to check the ignition system I sure would apreciate it.
Blindlightguy
Then put the test light on the - (NEG, Tach) side of the coil and crank the engine, it should flash.
No Power on + side = bad ignition switch or fuse link.
No Flash on - side = bad TFI module, start wire to TFI module, Ignition Coil or PIP sensor.
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Joined: Mar 2006
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From: Venetia, PA
You may be getting fuel through the lines, but are your injectors may not be working. Unplug one of your injectors and use a volt meter to check if you are getting power when the engine is cranking.
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From: Easton,Ks
Originally Posted by mrl390
You may be getting fuel through the lines, but are your injectors may not be working. Unplug one of your injectors and use a volt meter to check if you are getting power when the engine is cranking.
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After mcuh trouble I got a spark plug out and turned over the truck. The plug sparked so I am going to take that as a sign that the ignition system is fine.
I am now running down fuel problems, I have been shorting out the test plug and the relay is clicking, but the pumps are not running. I unplugged the conection for the high pressure pump and had an assistant short the plug and I didn't get any voltage. I am not sure that had a great conection when I was testing but since neither pump has turned on I am thinking it's an electrical problem.
I tested continuty on the intertia switch and that tested out ok.
Should I just replace the relay since they are cheap?
If I don't get this fixed today it is going to the garage, because I don't have the time to deal with this problem.
I am now running down fuel problems, I have been shorting out the test plug and the relay is clicking, but the pumps are not running. I unplugged the conection for the high pressure pump and had an assistant short the plug and I didn't get any voltage. I am not sure that had a great conection when I was testing but since neither pump has turned on I am thinking it's an electrical problem.
I tested continuty on the intertia switch and that tested out ok.
Should I just replace the relay since they are cheap?
If I don't get this fixed today it is going to the garage, because I don't have the time to deal with this problem.
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I just checked for voltage at the inertia switch and with the key in the run position I have twelve volts.
Any ideas on what this all means.
Blindlightguy
Any ideas on what this all means.
Blindlightguy
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From: Easton,Ks
Originally Posted by blindlightguy
I just checked for voltage at the inertia switch and with the key in the run position I have twelve volts.
Any ideas on what this all means.
Blindlightguy
Any ideas on what this all means.
Blindlightguy