Headers installed now car is sluggish
Did you use O2 extensions or make your own????
After I installed headers I used old spliced extensions and after the car warmed up, it ran like crap. Car would spit and sputter.
After I installed headers I used old spliced extensions and after the car warmed up, it ran like crap. Car would spit and sputter.
Thread Starter
Launching!
Joined: Aug 2010
Posts: 234
Likes: 0
From: Cincinnati, Ohio
i used extensions. The car has 210,000 miles on it but made 270 wheel horse on the dyno a month ago before headers. I bought it last year and have no idea whats done to it. Everything appears to be stock so i think it was tuned previously and now that i removed my egr and air fittings and installed the headers,it needs a new tune because of the drastic change. What i am getting to is i think it was tuned good to the way it was and i changed it enough that it threw it off a ton.
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Verdad Gallardo Thread Starter
Launching!
Joined: Aug 2010
Posts: 234
Likes: 0
From: Cincinnati, Ohio
plugs are almost brand new, wires are brand new, firing order is correct, o2s are not throwing a code, i blocked the egr from exhaust to intake but left the vacuum thing on there for the egr, and i unhooked the hoses from the A.I.R. pump but left its connecter hooked up still.
Thread Starter
Launching!
Joined: Aug 2010
Posts: 234
Likes: 0
From: Cincinnati, Ohio
also ill be at school til thursday this week with limited computer access so it may be thursday night before i answer. Thanks everyone for helping me so far i hope to have it fixed and back at school on the dyno soon
^ answer to your issue lol
Nope......
nope it would be popping like a bag of orville redenbacher....not running rich
Your O2's will affect the motor at part throttle and idle which it should correct itself for however at WOT the ECM goes into open loop and does NOT look at the O2's so melted wire/bad O2 will not matter........
You need to delete your EGR AIR codes/parameters.......also change your cat overtemp paramters and finally tune that MAF table to get it dialed in.....if you know the AFR its at now which if its like my buddies it prob around 10.8ish you do the simple math and scale the MAF histo in that spot and your good to go..........
This is 100% the issue.....
Hope this helps
Mike
I don't think it's the tune. I'm still thinking the plug wires need to be looked at very closely to see if any are burnt. Even with burnt wires the engine will idle fine, but once under load will short out on the headers and make the engine missfire. One way you can tell it's the 02's is if the car runs normally up until operating temperature is reached.
I don't think it's the tune. I'm still thinking the plug wires need to be looked at very closely to see if any are burnt. Even with burnt wires the engine will idle fine, but once under load will short out on the headers and make the engine missfire. One way you can tell it's the 02's is if the car runs normally up until operating temperature is reached.
Depends on how many are burnt if any at all. This is a chronic pattern where someone installs headers and then complains about either misfires or backfiring only to find out several plug wires are burnt or put in the wrong order.
I forgot about the plug wires. A buddy of mine, his Z acted funny after it got hot. Give it gas and it'd stumble for a second and then take off. Found out all of his wires were just old. At night, you could pop his hood and watch the cool light show.
Try running LT4 KM maybe its pulling too much timing with the LT1 KM. After i did my headers i did not get a tune and it runs excellent. Like some people have said i think either you cracked a plug or wire burned too close to headers and melted.
Thread Starter
Launching!
Joined: Aug 2010
Posts: 234
Likes: 0
From: Cincinnati, Ohio
im gonna buy new plugs and wires (even though mine have maybe 5000 miles on them) then ill update you guys. I hope they are the problem because i want to get some driving in before it gets to cold out.
Thread Starter
Launching!
Joined: Aug 2010
Posts: 234
Likes: 0
From: Cincinnati, Ohio
well i got the plugs out am doing some other things while i have the car in the air. The passenger side had some burnt plug wires, also all the passenger side plugs are coal black?