Help!!! Explosion and smoke coming from intake grill!

[Dgnarvs]

Okay, the shop has put everything back together but it now appears that the car is in limp home mode and RPM whilst on stop cannot get past 2000.

A bit of background... The battery died a few days back because I haven't used the car in weeks. Bro got it jump started and brought to the shop to replace the battery.

I've done some research on the forum and it appears a few others have had similar experiences about the limp home mode after battery dies. I hope it's just a case of resetting he codes... I've read others had to replace the throttle body!

Still don't know for sure what caused the explosion/smoke.

However, all of these appear to be connected to the intake. MAF issue? Throttle body? Crap!

[Skootnasty]

Sounds like it backfired during startup. What are your DME codes? If the throttle body did indeed take a voltage spike, or some sort of electrical gremlin bit it during the jump start/battery replacement, then it could cause a backfire through the intake. If it failed in a manner to affect the 5v reference circuits then it could cause a backfire through the intake. Incorrect cam timing can cause a backfire through the intake.

The list can continue to grow without DME codes. Start there and see where it goes. Beyond that its lot of speculation.

Skoot

[Dgnarvs]

Originally Posted by Skootnasty

Sounds like it backfired during startup. What are your DME codes? If the throttle body did indeed take a voltage spike, or some sort of electrical gremlin bit it during the jump start/battery replacement, then it could cause a backfire through the intake. If it failed in a manner to affect the 5v reference circuits then it could cause a backfire through the intake. Incorrect cam timing can cause a backfire through the intake.

The list can continue to grow without DME codes. Start there and see where it goes. Beyond that its lot of speculation.

Skoot

This makes sense. Thanks, Skoot. CEL did not light up but there is a fault code 412.

[Dgnarvs]

This probably sounds stupid but we only need one throttle body for a Boxster S, right? Just got confused because I was checking Pelican and on a replacement throttle body, it says 'quantity required: 2'.

Just want to be 100% sure that I order the right parts/quantity...if it is indeed the throttle body that I need to replace.

[Dgnarvs]

Update: shop cleared the error codes and car running okay. However, when turn of the engine, limp mode comes back at next start cycle. Shop's computer reads fault code 412 but they couldn't tell me what it means as their 'porsche expert' had to leave!

So, bro took the car home and everything appears to be normal for now. Will check again at next atart cycle.

Still worried about that 412. Any help guys?

Did a bit of research and the same symptoms could mean a dirty throttle body, a replacement throttle body, an oxygen sensor replacement or maf!

Your thoughts, please.