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Discussion Starter · #1 ·
My car seems to ping under heavy throttle, in all gears.

It is a 1993 D15B7 in a 1990 HF car and tranny.

I did put in an A6 ECU to replace the Stcok HF A8 ECU. Put the pinging is still there.

Is there a way to retard the timeing just a bit to stop the pinging?

TIA

Bob
 

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sure there is, first you have to disable the ecu from automatically changing it on you. to do this you have to go to your passenger kickpanel and find a little 2 wire blue plug sticking out of the lower corner of the dash/kickpanel and jump the two wires with a cotter pin or paper clip, or small wire, this will allow you to manually set your ignition timing and it will stay where you set it. Once you jump this plug just loosen up your dizzy bolts so you can turn it either way, get a timing light and point it at the crank pulley, there are 4 marks on the pulley, 1 by itself, this is TDC (0 degrees) for setting your cam timing, then there are 3 marks close together, these are the ones you want to use, the middle one is base timing (18 degrees advance it is i think, maybe 16) i dunno, the mark just after it is 2 degrees advanced passed base timing, the mark before it is 2 degrees retarded from base timing. Make sure before you set your ignition timing your motor is at full running temperature and idling normally at about 7-800 rpm's then your good to go. once your done, tighten your dizzy bolts back up, check it again to make sure it did'nt move and if all is good just un-jump the jumper plug and your straight.
 

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A few degrees of crank rotaion is not going to stop the pinging. I suspect the valve timing is off a tooth or two. That has to be one of the most common things done wrong with a timing belt change or engine swap. Get someone who knows how to check it check it or do a search for instructions. It's not really all that hard actually. Need more help, let us know.
 

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sorry about my grammer, i'm not college educated and i barely graduated high school. It could eliminate pinging by just adjusting the dizzy, when i put in my old single cam a while ago i just bolted the dizzy on and did'nt have a timing light, it would detonate and ping under load and especially going up hills. I got a timing light, check it and sure enough it was a good amount advanced, i set it to base timing and no more pinging ever again. It all depends on why his motor is detonating.
 

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Discussion Starter · #7 ·
I have no timing light and only very basic hand tools.

Is it worth it to take the car to Mr. Fixit and have them check it or should I just have the timing belt replaced?

The shops I have gone too all want to change the water pump at the same time and want about $350 for a new timing belt/water pump.

Not knowing how long the timing belt has been in the car, thought it safe to replace it.

Oponions?

Bob
 

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therobesons said:
I have no timing light and only very basic hand tools.

Is it worth it to take the car to Mr. Fixit and have them check it or should I just have the timing belt replaced?

The shops I have gone too all want to change the water pump at the same time and want about $350 for a new timing belt/water pump.

Not knowing how long the timing belt has been in the car, thought it safe to replace it.

Oponions?

Bob
If you do not feel comfortable and/or have the proper tools to do it, taking it to a qualified mech to do the job right is worth it in the long run. It can save you lots of headache and possible down time.
 

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therobesons said:
I have no timing light and only very basic hand tools.

Is it worth it to take the car to Mr. Fixit and have them check it or should I just have the timing belt replaced?

The shops I have gone too all want to change the water pump at the same time and want about $350 for a new timing belt/water pump.

Not knowing how long the timing belt has been in the car, thought it safe to replace it.

Oponions?

Bob
$350 sounds pretty reasonable for a new timing belt/water pump install. You want to put in a water pump because it's driven off the timing belt and if it siezes it'll break the belt. It's not a very expensive part and once you've removed everything to get to the timing belt (lots of work), labor to swap the water pump is next to nothing.
 
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