hooper

hi my dad has a 1998 Porsche Boxster 986 we really need help it's having a misfiring issue it only does it at idle i want to solve this asap because my dad told me if i do good in school i can have the car when I'm 25 I'm currently 18 before the motor blows we took the manifolds off and have installed headers and got rid of the cats it just runs through the muffler does anyone have any ideas of what it could be or so things that we could do to fix this it had a check engine light on before we have a obd2 reader and before the misfires started it was a o2 sensor code could that possibly be causing it? thank you in advance and would love too hear what ya'll think it could be respond asap please and thank you.

Dllrd23

Did you install anything that replicates the o2 signal. I would start there is not.

hooper

Dllrd23 thanks for the reply no we have not replaced anything that replicates the o2 signal if i remember correctly we have normal o2 sensors in there i believe they are cheap ones though me and my dad are thinking about switching the ones that are further back near the headers with the ones that are near the muffler

Dllrd23

I assumed that when the cats came out so did the o2’s. The downstream ones measure how well the cats are working. The ones closest to the engine in the exhaust stream have fuel control responsibility. I thought the upstream ones were directly in the cat?? Is this incorrect?

hooper

would that be a good idea?

hooper

honestly i might be a little confused i have not looked under there in a while so i would have to look under there again how ever i did talk to my dad about it yesterday he said that when we get the time we will start with the o2 sensors not going lie my dad knows this car better then i do and since it's misfiring we should not drive it because it could cause more damage and also my dad said that he thinks it could be a rich misfire

jerome951

Is the exhaust black and smell like fuel when it's misfiring?

hooper

um honestly I'm not sure I'm in the car when it's doing that sorry

hooper

here are the spark plugs coils and a pic of the car and the headers and the codes

coils

picture of the car

headers and pipes

coil 4

coil 5

coil 6

spark plug 4

spark plug5

spark plug 6
codes
p0160

p0151

p0300

p0306

p0304

p0305

Starter986

Can we get close up pics of the spark plug ends? Also... clearer pics of the insides of the coils? What kind of plugs are you using? What brand of oil? Viscosity? When was the car last smogged? What is your experience working on cars?

hooper

we all ready put the coils and spark plugs back in and my dad said he does not feel like getting back under the car to get those I hope you understand plus my dad has taken on another project on the car at the moment he is trying to rewire the upgraded sound system and wire in a 12in sub in the trunk of the car

Starter986

Got it. Misfire. ****load of codes. But, hey... lets slap in a sound system.

Good luck, young man. Maybe a Toyota next time. I'm out.

smh

hooper

I appreciate your help and trying to help but there is absolutely no need to be an *** about it man like seriously

hooper

also it's not your car is it so my dad can do what ever the **** he wants to it

walfreyydo

Report this profile, user is copy/pasting others responses likely as a way to build post counts so they can start scamming people on the marketplace