ok i keep throwing code 73. which means misfire in # 3 cyl. ive changed the plkugs, wires, car, and distrubutor. waht gives. any one have any suggestions?

 

did you check your injector? what is your timing set at?

 

Injectors and timing belt my friend.. you might need a new timing belt.. use some fuel injector cleaner or get some new injectors all together... if that doesnt work its most likely your timing belt... which means.. your gonna pay tha major money to get it fixed.. 500 - 1000 most likely! Unless its under warrenty!

 

i think his warranty is voided

 

timing belt? but it didnt snap. pleaae explain more on taht theroy plesae

 

when i threw code 73 it was because the piston was fried and the rings were gone.

 

ahhhh so waht did u do next rebuild

 

do a compression test first before thinking of rebuilding.

 

yeah i am tuesday i think. kinda afraid u know

 

the timing belt could just be worn out with missing teeth and what not.. this was the problem on my friends 3000gt he would miss hit till he got to 5000 rpms.. then it was like hitting vtec.. LoL! But your piston could be fried as well.. that would suck ***

 

yah theres no telling waht it is. thx guys for ur time and help, still open to any other sugesstions

 

Have you reset teh ECU and checked to see if the code pops up again? Just to make sure it's not just a random code.

Any condition(s) in particular where the misfire occurs? - ie: only when AC is on?, only when AC is off?, when accelerating?, at idle?

Is it a steady misfiring that happens every cycle (repititious) ? Or, does it only happen every so many cycles? -Sounds kinda erratically lumpy (as if you had a big cam on the car).

My guess is that your ignition isn't firing somewhere along the line....ignition coil, distributor, rotor/cap, plug wires, plugs.

Either that or it's a false code that's being triggered by something else. But, this isn't the likely case considering that the #3 cylinder is the only one showing a misfire code. If something else was triggering the misfires, it would probably also cause false misfires in all the cylinders, not just #3.

 

well i reseted it once and it didnt come on right away. i drove for like 15 20 minutes and it still did not come on. so when i parked, i let the turbo timer count down like always. then it came back on, same code, so it comes on at idle, and now when it idles for a bit the cel will start to blink. a constant blinking,

 

Did you replace your rotor too when you replaced the distributor cap?

Even tho I doubt that the rotor is to blame b/c it's only your #3 cylinder. A faulty rotor would misfire on any random cylinder or all of them. But, just as a precaution, you'll want to have all your bases covered to leave no doubt that there might be something wrong with it.

How does the engine sound after the misfire code has been triggered? Does it sound like it's idling on 3 cylinders?

You might wanna try this to see if your ignition is working properly in your #3 cylinder.

Find the #3 plug wire lead connected to your distributor cap. Unplug the lead and see if the idle quality changes. Reconnect the plugwire and as you do that, check for a spark (you might need to pull the boot back if you can). Do the same with another cylinder plugwire and compare the spark intensity to the #3 lead. If the spark is similar, then the problem is probably somewhere forward of the distributor.

You can also try this at the plugwire-spark plug junction to see how the wire is doing its job. And then once again with the spark plug out of the #3 cylinder to see how it's firing. Actually, now that I think about it, work from the spark plug back towards the distributor to see which part is failing to carry the ignition spark properly. Don't forget to use cylinder to cylinder comparisons to determine if it's weaker in #3.

If your ignition is fine, then the fuel injector would be the most likely culprit.

Just FYI, but non-igniting misfires can damage the cat b/c the fuel mixture can ignite in the cat or flood it with fuel.