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aka: kemicalburns
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7,883 Posts
Discussion Starter #1
Ive run 89 octane fuel, set timing to 8* btdc and just replace the egr tube because the old one was snapped in half. What could be causing this. the only things left are plugs and wires from what i can figure. the plugs are standard autolites and the wires are accel wires but are really long and are routed the best i can get them. this is getting frustrating :banghead

any ideas guys?

Thanks
Late
 

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www.easttn4x4.com
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2,191 Posts
kemicalburns said:
Ive run 89 octane fuel, set timing to 8* btdc and just replace the egr tube because the old one was snapped in half. What could be causing this. the only things left are plugs and wires from what i can figure. the plugs are standard autolites and the wires are accel wires but are really long and are routed the best i can get them. this is getting frustrating :banghead

Lol.... an old engine maybe? Try this

http://about-the-web.com/shtml/reports/08-035.shtml
 

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aka: kemicalburns
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7,883 Posts
Discussion Starter #4
Lookinfurfun said:
But didn't you just get this motor from the junkyard? :cry :banghead

Isn't it supposed to be set at 10*?

Did you double check all vacuum lines for leaks too?

there are no leaks that i have found, ive tried 10 and even 13 btdc and doesnt make any difference. Im wondering when i installed the motor, i had to get a different distributor with tfi module. maybe i put it in a tooth or two off. im gonna get a code reader from schmucks for 30bucks see if any codes come up.
 
G

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If your dizzy was off by one tooth it would really be acting up alot! Easy to check though. You retard timing when it knocks/pings stay at 8, no higher, if it is pinging there. I would try 6.
What all have you done to the motor in the way of power adders? If you've done alot the stock computer can't adapt to all the changes. You get more air, for more power but the fuel won't be there = lean = knock.
Good luck! I hope you pull some useful codes.
 

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How about a check of the fuel pressure? I agree, stay at 8 with the timing, maybe go down to 6 and see if that does it.
 

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aka: kemicalburns
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7,883 Posts
Discussion Starter #7
I have no power adders at all. running K&N replacement but thats hardly a power adder in my book. the timing is at 8* and it still pings at low rpms, i am afraid of going any lower and losing alot of power.
 

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I have a friend that has an 87 Bronco and she has the same problem. She says when she puts mid-grade or premium in it stops. Maybe that will help a little.
 

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aka: kemicalburns
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7,883 Posts
Discussion Starter #9
ive just filled up with 89 the other day will no change . this sucks because i dont want it to mess something up. Im gonna try some fuel cleaner and seafoam to see if its maybe caused by carbon buildup
 

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kemicalburns said:
ive just filled up with 89 the other day will no change . this sucks because i dont want it to mess something up. Im gonna try some fuel cleaner and seafoam to see if its maybe caused by carbon buildup
The last time I did an oil change I used engine flush and black chunks came out when I removed the drain plug. It also seemed to run better. Maybe you should try that. I usually dont believe in those cheap cleaners and other stuff, but I use em anyways, just in case.
 
G

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The last time I did an oil change I used engine flush and black chunks came out when I removed the drain plug. It also seemed to run better. Maybe you should try that. I usually dont believe in those cheap cleaners and other stuff, but I use em anyways, just in case.
__________________
^^ Example of what not to do. If you release the chunks of built up carbon, than you will either,.

A. Clog an oil passage from head to block.
B. Clog oil pickup.

Best bet is not to put any cheap cleaners in an old motor. Leave the chunks be, they are arent hurting anyone.
 

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or go to autozone and they will pull the codes for free
 

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aka: kemicalburns
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Discussion Starter #19
I have found out what my low rpm ping is now. stoped by the local ford specialist shop the guy took a rubber hammer and banged on my front cat and what do you know rattle rattle rattle. so really i never had a ping but the cat was shot and rattling . So now i am gonna call the local muff shop and talk getting this replaced. Whats a good HI flow cat to use. I have 3" exhaust from the cats back already, they will have to remake my Y pipe to an while this is done have them install the JBA headers I got for almost nothing. ? I was going to have my headers sent off to get coated and the mechanic said that if they are used headers that the coating wont last on them for nothing and to save my money. What do you guys think about that?

anyways just thought i would resurect this dinosaur post.

late
 

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aka: kemicalburns
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Discussion Starter #20
well the rattle or ping was a high pitch , so was very confusing. but when he was bangin on it the sound was almost identicle. this problem was somthing i was trying to diag from inside the cab, an would only happen when i would leave from a start or when i backed way off the throttle going down the road. if i was in the throttle or going up hill it wouldnt happen. plus my exhaust is a bit loud to so it made things harder to figure out. the cats are as old at the bronco to. how long do they usually last?
 
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