3 questions
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Junior User
Joined: Feb 2001
Posts: 76
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From: Bay City, MI
3 questions
1. When i replaced my ignition module i set the timing a little bit more forward. And it would knock/ping every now and then. Then it would get worse so i would turn my distributor back. Now, i have no pickup and it stills pings. BAD. Upon accleration i can here it ping. Then when in overdrive at 45 and i barely touch the gas it pings. It has a new O2 sensor. Any ideas?
2. I hear a rattling from the rear when i have it in drive and the brake pressed. It goes away in neutral. And i cant hear it when outside the truck, only inside. What should i look at?
3. Does anyone know where i can get a pre-runner style replacement bumper. You know the tube type where it sticks out a little bit.
Thanks in advance.
Tom
2. I hear a rattling from the rear when i have it in drive and the brake pressed. It goes away in neutral. And i cant hear it when outside the truck, only inside. What should i look at?
3. Does anyone know where i can get a pre-runner style replacement bumper. You know the tube type where it sticks out a little bit.
Thanks in advance.
Tom
New User
Joined: Mar 2001
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3 questions
tom,
if i were you i,d set my timming where it should be and then i would check some other things.
check your carb and your intake, sometimes a vacuum can cause it to ping, also vacuum advance not working right.
your egr can cause pinging if it,s not right, plugs also can cause it.
i had that problem on my f250 460 engine, it was the vacuum advance. i replaced it set the timming on 8 degrees, and run middle grade or better fuel.
your noise while sitting in the truck could be the exaust ratteling, or a bad muffler. check it out.
good luck
i,m guessing you have a carb.
if i were you i,d set my timming where it should be and then i would check some other things.
check your carb and your intake, sometimes a vacuum can cause it to ping, also vacuum advance not working right.
your egr can cause pinging if it,s not right, plugs also can cause it.
i had that problem on my f250 460 engine, it was the vacuum advance. i replaced it set the timming on 8 degrees, and run middle grade or better fuel.
your noise while sitting in the truck could be the exaust ratteling, or a bad muffler. check it out.
good luck
i,m guessing you have a carb.
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Junior User
Joined: Feb 2001
Posts: 76
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From: Bay City, MI
3 questions
After i posted the message i realized i was very vague on what kind of truck i have. Its an 89 Bronco 5.0 EFI. Its not carbed. Since its EFI anyone hints. And i have new exhaust from Midas (performance special). Its tight. Any other info would be appreciated.
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Joined: Jan 2001
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From: Virginia
3 questions
Are you unplugging the spout connector when setting the timing? The computer has control over the timing unless you disconnect this temporarily to set the timing with a light. I wonder what would happen if you took the battery cable off for a minute and put it back on. The computer learns and makes minor adjustments to it's settings over time. If you make any changes to the engine I think it would be a good idea to take the battery cable off to erase this learning and let it re-learn everything. It may not make a difference but I think I would try it and see if it did.
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Junior User
Joined: Feb 2001
Posts: 76
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From: Bay City, MI
3 questions
I dont know what a spout connector is. Are you referring to the ignition module plug in? If so, yes I am. I am not setting the timing with a light. I am just turning the distributor to about where it should be. And i did try the battery disconnect idea to no luck. I am going to replace the spark plugs tomorrow. Could a faulty ignition coil do this? It also has new wires, cap, rotor and ignition module.
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Junior User
Joined: Feb 2001
Posts: 76
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From: Bay City, MI
3 questions
Well, replaced the plugs today. Autolite platinums. The olds one kind of had a whitish tint. Is this good or bad? And the pinging is still present. What's next to check?
Senior User
Joined: Jan 2000
Posts: 248
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3 questions
You need to set your timing with a timing light. Put it back to facotry specs after disconnecting the spout connecter, and get back to us. You have no way of knowing where the timing is without a light. While you can set it by ear, that doesn't help at all when diagnosing it..
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