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Discussion Starter #1
Ok, we have a 1969 Ford truck with a 290 in line 6 cylinder engine and manual transmission. We have spark at all the plugs, perfect timing, gas at the carburator, checked for flooding, good compression in each cylinder, no vacuum leaks, and the car will not hit a lick. I even checked the exhaust pipe for blockage and the engine makes no attempt to start at all. Give me some ideas.
 

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jim i dont knough why im telling you for you already knough but you may check the selniod on the fire wall or the coil wire i had the same problem with my 77ford i changed these and took off gordon
 

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If you are sure you have proper timing and spark, I would pour about a half cup of gas down the careburetor and see if it actually runs. If it doesn't, your spark timing or cam timing is probably wrong.
 

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I am completely baffeled. I have checked everything 18 times and can't find anything wrong. This vehicle belongs to a friend of mine. If we don't come up with something quick, he is going to have it towed to a mechanic for repair. I am so ashamed I can not figure this out.
 

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Try a different coil, when coils go bad they will sometimes fire a spark in free air but not under compression.
 

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jimweeks,howdy!ditto the plugs!if they have been cold fouled they wont fire under compression.whatever happens let us know,there is always something out their to stretch our limits!jimm
 

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If it has a power brake booster check the vacume line going from the carb to the booster, sometimes when the boosters go bad they shoot brake fluid into the carb resulting in the car not starting. Its an idea, but I'm no mechanic
 

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Yeh Jim, sometimes it gets baffling, especially when everything seems to be like it is supposed to be and nothing works. I had one awhile back doing just like that, I was getting fire and gas and the timing had not been fooled with. Finally found that the roll pin that holds the gear on the bottom of the distributer had sheared and the gear had slipped and then locked to the shaft on the shards of the broke roll pin. You could turn it over and the rotor turned around like it was supposed to. You could pull the plug wires one at a time and they were fireing, You could put number one up on TDC and look at the timing mark and it was in time, and it was getting gas. But it was fireing at the wrong time. Never did figure out what cause the pin to shear though, but got her to running and never had another problem out of it. Good Luck
 

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Discussion Starter #9
I have learned something from each of the posts, so I appreciate your input. I tried every suggestion everyone made and it still would not even act like it wanted to start, so I told my friend to go ahead and have it towed in for repair. An hour later the shop called to let us know the truck was fixed. I had been sweating over this thing for days and this guy finds the problem and fixes it in an hour! Can I show my face again? Any way,I was the first one into the shop to find out what the trouble was. The mechanic was nice and explained that the trouble was with a partially bad ignition switch. He said this will cause you to have some spark, but its weaker than it should be and under compression there would be no spark at all. He simply replaced the ignition switch and it starts up and runs fine. I'm going home now. Thank you.
 

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Yeh Jim, you can show your face, anyone who does much mechanic work is going to get snakebit every once in a while and you just got snakebit. Glad they got it fixed easy enough without it being something real expensive. Yeh, I learned something from this also, I had thought about weak spark, but I was thinking coil, module whatever, I would have never thought about the ignition switch doing that. Glad you got it going and glad I learned something in the process. :D
 

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I would give that mechanic all my work if he could figure out a bad ignition switch that quickly, sounds like a keeper.
 

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hi jim glade you got the veh running but i wouldnt have thought switch ether i hope it gives you many miles to play with beleave me ill rember switch gordon
 

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jim, i am so sorry , i had a t-bird in the 70's that exhibited the same symptons.my brother -in- law suggested i run a hot wire from the battery to the ignition side of the coil,i did, it ran the upon tracking the ignition wire back to the main firewall plug-in idiscovered that it was 99% severed.sorry i didnt remember,running a hot wire would have put you on the problem,just remember, if we always got it right no one could stand to be around us,jimm
 

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Hi Jim, ditto to what everyone else said. We all get bit. There's been times where I've looked like the hero at work and others where I've wanted to bury my head in the sand. Sometimes there's just so many possibilities that experience more than smarts is needed. I have seen many smart guys stumped only to have someone else walk over and go 'hey did you try this'. That guy is not neccessarily any smarter, but experienced and 'been there done that'. We had a Mitsubishi in the shop not too long ago. Now we don't normally get these at a Ford dealership but we sold it used and had to fix it. This car started and ran but hessitated and missed on accelleration. The tech working on it checked fuel pressure, MAP sensor, other sensors, and then finally checked actual spark (which up till this point he assumed was ok) and found it was weak. He ended up replacing a 700 dollar distributor to fix it (coil part of distributor). So yes even an 'A' tech at a dealership gets stumped every now and then.
 
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