Hi all,

I put on a TJ sports exhaust onto my TH a few weeks ago. I noticed now that when its warm it takes a while sometimes to start. Ive reset the ecu and stuff but still the same. Is this common or an issue someone knows of?

Nope!

Sounds very weird. You even have a genuine exhaust, so there is even less chance of having issues:nuts:

Best of luck, let us know.

Thats very weird as I never had any issues with that exhaust when it was on the Magna and I've even had aftermarkets on all my Magna's (TN, TE and TJ) with no issues. I hope you can get all this sorted out soon mate.

has the cat collapsed on ya? thats the first thing i'd check it sounds like theres something blocking it

has the cat collapsed on ya? thats the first thing i'd check it sounds like theres something blocking it

I ahve NFI.. How can you tell? It goes alot better it feels alot more freed up than before, especially the top end it hammers im surprised. Its just sometimes when im parked after driving and turn her on, she takes a few seconds to start and when she does, it sounds like it catches on.. Like a slight pause then turns on.. so weird..

nah i dont think it'd be what i suggested

Done the exact same mod and no issues here. You crazy turkey :nuts: lol.

Sounds to me like the fuel is vapourizing causing a vapour lock, is the car running at normal tempreture?.
This fault can have a few causes. The first is where you buy your fuel from. When the weather temp starts to drop some fuel companies add arromatics to increase fuel vapourization when cold. Especially if it drops below 0 deg.
Also some cars have a device to allow full pump pressure at the fuel pressure regulator when hot starting. This helps to clear the vapourization from just above the injectors.
Also it may be a defective fuel pressure regulator, defective fuel pump, tempreture sensors.
Check the fault code from the ecu, just in case it's an engine component fault. Check all pipe and electrical connections, especially aroud the areas where you have been working.
Check the fuel pressure, engine cold, hot and turned off. Falling pressure when switched off also indicates a leak somewhere (internal).
How long have you owned the car, did you notice it this time last year?
I think it's coincidental that a new exhaust has attributed to this problem unless you have displaced a connection somewhere.

Some food or thought...