Car runs like garbage!
Car runs like garbage! Ok, here are my car's symptoms:
Runs bad/chokes, lots of backfires/popping out exhaust/muffler
BLACK smoke/exhaust pipe tips, heavy suit, my entire rear bumper, license plate, and exhaust tips are just covered in this blackness
Under load or acceleration the car doesn't seem to pull and i can hear and feel like stutters in the acceleration
What's wrong.
Runs bad/chokes, lots of backfires/popping out exhaust/muffler
BLACK smoke/exhaust pipe tips, heavy suit, my entire rear bumper, license plate, and exhaust tips are just covered in this blackness
Under load or acceleration the car doesn't seem to pull and i can hear and feel like stutters in the acceleration
What's wrong.
TECH Fanatic
Joined: Jan 2005
Posts: 1,162
Likes: 0
From: St. Augustine, FL
borrow someones scan tool and check the codes (I'm assuming all that craziness has to have the check engine light on). Sounds like its super rich, coud it not be 02's or some wicked vacuum leak?
Originally Posted by Red97Z
What symptoms made you decide it was the opti, jus curious.
I hung out with him alot, so I rode in his car alot.
One fine day, the car started to sputter around 1800-2200 rpms, quarter throttle, on load.
Soon enough, it got worse, and cylinders started to misfire.
Well finally, the opti caused the #7 cylinder to blow a piston ring, causing a loss in compression, tons of smoke coming out all the time.
If youre Z28 is misfiring/sputtering, check all of the basics first. Plugs, coil and wires.
If those are ok, its probably the opti spark.
Gotcha, will do, the plugs were recently replaced with tr6's, and my wires are moroso spiro max replaced like 3 months ago. The coil is a MSD unit, but the opti is old, and it did get very wet during a big rain storm. I'm also running a vortech blower, and i did not notice any vacuum leaks. Sounds like it's the opti, by the way, is there a way to check to see if each wire is gettting spark?
The blower is only going to make a misfiring engine worse. With more compression inside, the internals are under more stress.
I think it would be in your best interest to not drive the car at all... I know I wouldn't if it was mine.
First things first, go put the car on a scanner. Advance Auto do it for free, but if you can't drive it there, im sure a shop will work something out with you.
See if your PCM is throwing any codes.
For example, if you get a misfire on a cylinder #5, check the wire and plug for that cylinder. If you have to, change them again.
Just because parts are new, or aftermarket, doesnt mean they can't malfunction/break.
I think it would be in your best interest to not drive the car at all... I know I wouldn't if it was mine.
First things first, go put the car on a scanner. Advance Auto do it for free, but if you can't drive it there, im sure a shop will work something out with you.
See if your PCM is throwing any codes.
For example, if you get a misfire on a cylinder #5, check the wire and plug for that cylinder. If you have to, change them again.
Just because parts are new, or aftermarket, doesnt mean they can't malfunction/break.
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How new are your O2s?
Have you checked the wire/connector that connects to the opti? Sometimes that's the problem.
Also check your MAF, that could possibly be your issue as well.
My car had similar issues it'd miss only once it was to operating temperature under load, and only at midrange RPMs. Turns out that my wires were barely melted just enough that the heat would cause enough resistance to make it run like crap at mid-range, but not completely at WOT. So just make sure to thoroughly inspect all of the wires and plugs.
There are quite a few things that could be causing it to run terribly. Best thing is to just go through one by one and eliminate the issues.
Have you checked the wire/connector that connects to the opti? Sometimes that's the problem.
Also check your MAF, that could possibly be your issue as well.
My car had similar issues it'd miss only once it was to operating temperature under load, and only at midrange RPMs. Turns out that my wires were barely melted just enough that the heat would cause enough resistance to make it run like crap at mid-range, but not completely at WOT. So just make sure to thoroughly inspect all of the wires and plugs.
There are quite a few things that could be causing it to run terribly. Best thing is to just go through one by one and eliminate the issues.
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