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Old 02-13-2007, 09:51 PM   #1
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Default some problems

the other day my car started to idle funny.so i check my plugs (still fresh).looked for vacumm leaks(has 20~hg at idle).unpluged the sensors on the throttlebody.which made it idle rough.

so i went and but fuel injector cleaner made it idle alot smoother.
(i ran the car low on fuel in 15*,so i think i sucked up the junk on the bottom of the tank)

finally i checked my timing because my car wasent reving quick and bogging around 4500 rpm.well any way my timing mark was about 2 inches from 10*btdc.

so do i buy a new harmonic damper,balancer.and where from because no one online carries them.

oh yea, my clutch slave cylinder went too.
so im gonna order a new ,fuel filter, plugs,wires.

any hints or ideas guys?

Last edited by Braineack; 02-16-2007 at 08:01 PM. Reason: 20lbs is silly.
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Old 02-14-2007, 10:27 AM   #2
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Hey Pezz, did you check the nose? Do you have one of the short nose 1.6's? Maybe you have a worn keyway on the crank?

You should check that too..... That would explain why it doesn't feel right, and why the timing would be out that much.

Dave,
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Old 02-14-2007, 11:21 AM   #3
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Keep my updated if you need a crank pulley from a 1.6L. I may have a bottom end to part at the end of the month.
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Old 02-14-2007, 11:51 AM   #4
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hmm i might try to snag that from you, mine is showing weird timming tendencies as well.
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Old 02-14-2007, 11:53 AM   #5
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Quote:
Originally Posted by turbopezz View Post
finally i checked my timing because my car wasent reving quick and bogging around 4500 rpm.well any way my timing mark was about 2 inches from 10*btdc.
woah there, hold on a second ... I think what you are talking about is totally normal. Did you use a timing light and try to adjust your cam angle sensor to set your timing?

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edit, sorry I just had to make sure.
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Old 02-14-2007, 12:06 PM   #6
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some pulleys have multiple marks on them, be sure you are checking timing with the correct one.
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Old 02-14-2007, 12:11 PM   #7
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I had a harmonic damper/balancer bite the dust. Well, more like slowly over time. Taking it off, you can't seem to move the two pieces relative to each other, but the shear from the belts/engine is more than I can give by hand

Got a good balancer and the timing mark was back where it should have been.
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Old 02-14-2007, 09:40 PM   #8
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its a long nose crank.it has the bigger pulley.
i think the harmonic balncer is "soft" and pulls that why i cant get a accurate reading..
where should i be seeing my mark at 10*btdc (with a light).?

also when i disconnect the Idle Air Control Valve when the car warms up. it doesnt search for the idle
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Old 02-14-2007, 10:10 PM   #9
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Mine was also a long nose crank. The timing mark showed up pointing straight to the ground. Find a decent harmonic balancer and throw it on there. I got mine from RSpeed for $40. They had an extra sitting around.
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Old 02-14-2007, 11:06 PM   #10
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ok, let me get this straightened out:

1) you have a 93 1.6, there is no harmonic balancer on that engine. I rebuilt one just a few months ago (the one in the picture above). Its just a normal ol pulley and thats it.

2) there are multiple timing marks (edit: i meant dots on the pulley) on some and other times theres just one. If there are two, there should be one lined up on 10* and the other one on 0* for 10* btdc timing.

3) did you put the car into test mode (i.e. connect TEn and GND with a paperclip)?

4) did you connect the timing light to your #1 plug wire?

Finally, if you are still unable to figure out your problem read through this article http://www.miata.net/garage/ignition.html and more than likely you will be able to figure out your problem. Pay special attention to the "checking your timing" section.

good luck,
ryan

Last edited by akaryrye; 02-14-2007 at 11:34 PM.
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Old 02-14-2007, 11:15 PM   #11
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IIRC, there aren't multiple timing marks, just multiple dots. And I believe that there is only more than one mark on 1.8 pulleys. Also, the harmonic balancer is part of the pulley. Most vehicles are that way these days. Most of the mass of the pulley is forward of an internal rubber bit. This rubber bit, unseen without ripping the pulley apart, can weaken, stretch, or become misshapen with age. That's what causes a timing mark way off in many cases. Also, if the timing mark won't stand still in "test mode," the pulley/balancer is likely to blame. If yout take it off, there's an easy way to check if it is ok by looking at the position of the white dot in relation to the elongated notches in the pulley. Compare it with a pic you find online. Mine was waaay off when I replaced it.
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Old 02-14-2007, 11:33 PM   #12
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ah, thank you for explaning that atl, i see now that you may in fact be correct on this one. Ive never heard of this before. I also wanted to make sure that the original poster had all the fundamentals down and was using the correct procedure for checking/setting his timing.
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Old 02-14-2007, 11:43 PM   #13
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On my race car, the machine shop I used to balance the engine flopped the mass changes 180*, and I learned real quick where harmonic balancers are hidden
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Old 02-14-2007, 11:52 PM   #14
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speaking of a balanced engine, i think the engine i rebuilt is a little out of balance because its a bit noisy ... ahh well thats another thread for another day. For now it is running and strong and hasnt failed yet lol
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Old 02-16-2007, 06:33 PM   #15
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ok,new wires on the car and the idle is smooth.
but its still searching foridle when its warmed up and i get off the gas.
does anyone know how many ohms a in spec Idle Air Control Valve has.
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Old 02-16-2007, 06:54 PM   #16
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If I remember correctly it was like 12 ohms, this is the little thing on the bottom of the throttle body right.
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Old 02-16-2007, 07:36 PM   #17
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yea thats it,i just read you post on m.net,11-13 is good,
if your over the coil is burnt out and is not rebuildable.
also the piece is pricey from 150-500 new from mazda.
but luckly i have 1 from my old motor.
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Old 03-08-2007, 03:35 AM   #18
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ok to finish the harmonic balancer part of this.
i recieved a newer one look good yada yada.

i removed the harmonic pulley from my short nose crank.all i had to do is remove 4 bolts and pull on it.

so i went to my car(big nose crank) and unbolted the 4 bolts an pulled of the pulley.then visually looked at the newer one and older one.

HOLY ****,the old one became 2 parts.

so i busted loose the 22mm bolt the goes to the crank and pulled the rest of the harmonic balncer off.put the new one on bolted it up and used blue loctite.

finally check my timing look the mark is where it should be around except ist at 16btdc.so is set it to fm regular 10btdc for the link ecu.

so if you your timing mark is off a couple of inches swap it .

also i didnt get on my car when i couldnt find the mark and swaped it the day i got the new one.
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