terrible valve knock
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From: Everett Washing
terrible valve knock
I lost all spark about a month ago. I changed the icm today. had to pull the disty. made 3 marks, one on the disty to block, one where the rotor was pointing, and the other on the manifold from the back of the cap. , So I did this all today this hour, got it all back in.. truck fired righht up. But now its blowing an assload of rich smeliing smoke and has severe valve knock, liek theres no oil in the rig??? I know I could be off a degree or so, Would bad timing cause this to happen? Ive seen the smoke but never the knock. and the truck was running fine when it broke down..
302efi 91 f150
302efi 91 f150
Fleet Mechanic
Joined: Aug 2005
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From: Hartford, AL
Pull the spout and set the distributor at 10 degrees with spout removed with a timing light. To me sounds like way too much advance. If you don't have timing light, keep backing off dist. turning counter clockwise until things smooth out, but you really need to check and set as described above.
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From: Everett Washing
thanks . Ill have to dig out the old craftsman light lol... so wierd it went right back in the way it cameout, Thanks for the response bud. Im still new to the dyi mechanics, so im learning more everyday.
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I lost all spark about a month ago. I changed the icm today. had to pull the disty. made 3 marks, one on the disty to block, one where the rotor was pointing, and the other on the manifold from the back of the cap. , So I did this all today this hour, got it all back in.. truck fired righht up. But now its blowing an assload of rich smeliing smoke and has severe valve knock, liek theres no oil in the rig??? I know I could be off a degree or so, Would bad timing cause this to happen? Ive seen the smoke but never the knock. and the truck was running fine when it broke down..
302efi 91 f150
302efi 91 f150
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....The spout is a jumper that needs to be removed to set the base timing , by removing the spout it disables the computer advance , it should by the left fender below the master cylinder , its just a plug that pulls out of the wiring harness....Lew
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Fleet Mechanic
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From: Hartford, AL
Yes...this is a good point as well the bottom of the distributor engages the oil pump shaft....but that wouldn't explain the rich smelling smoke, as in the spark is occuring at the wrong time and leaving a bunch of fuel in the cylinders.
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From: Calverton
What does that mean?...it always would smoke in the past?
I would put a vacuum gauge on her, read these over.
http://www.classictruckshop.com/club...vac/vacuum.pdf ...and
Vacuum Engine Timing | MILEPOSTS Garage (Tech Tips)
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