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[email protected]
Samba Member
Joined: October 15, 2002
Posts: 3
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 Posted: Tue Oct 15, 2002 7:45 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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O.K.
I just recently choped my 77 and made it a Baja. It has a 69 engine in it, so.....
I bought a Tri-mil Bobcat exhaust and put it on. Took the old heater boxes off and everything. Then It starts to backfire ALOT. So I redo the points, and reset timing, and reset the Carb. I still backfire. Then I noticed that I burned a hole in one of my plug wirs so when I changed it out the engine prefromance was the same. Next I pulled the plug wire off the 3 & 4 on the distributer and no change I pull the 1 & 2 and the engine dies! I have spark going to all cylinders and the coil is good so I am very confused and need someones imput! Please some one help!!!!!!! I am ready to shoot her and put her out of her misery! |
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UncleBob
Grease Midget
Joined: August 21, 2002
Posts: 2862
Location: Northeast Florida
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| Posted: Wed Oct 16, 2002 10:46 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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How did it run before?
Did it backfire before you changed the exhaust? If not, I would assume you have a severe exhaust leak. |
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[email protected]
Samba Member
Joined: October 15, 2002
Posts: 3
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| Posted: Wed Oct 16, 2002 11:00 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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| It ran great. The preformance improved once I put the new nuts on the exhaust but it still backfired not as bad but it still backfired. I even redid all the points and timing and carb settings too. What do you think about the pistons not firing? |
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TimGud
Samba Member
Joined: March 03, 2002
Posts: 6459
Location: Rio Rico Arizona
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| Posted: Thu Oct 17, 2002 7:03 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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| OK, 3 &4 had no change so there is either no fire to those cylinders or no or little compression .Check your plugs cap rotor firng order & wires to those two. Do a compression check on 3&4. This will narrow it down to either an ignition problem or compression problem.Did you readjust the valves? If You did you may want to recheck them as well. Good luck. |
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[email protected]
Samba Member
Joined: October 19, 2002
Posts: 5
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| Posted: Sun Oct 20, 2002 1:17 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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| Have you double checked the firing order? It almost sounds as though you might just have 3&4 wires reversed. These things will run on just 2 cylendars, very badly though, even if the wiring is wrong. |
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[email protected]
Samba Member
Joined: October 15, 2002
Posts: 3
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| Posted: Mon Oct 21, 2002 8:19 am Post subject: Backfiring, Pistons not working HELP!!!!!!!!!!! |
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| The Firing order is correct. I went back and rechecked it. I am recieving Spark, but for some reason the cylinders just wont work. I checked the gap I checked to timing, I checked everything. I am running a bobcat Tri-mil exhaust if this helps at all. I don't think that it should make a diffrence. |
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