can't get pass 80mph

Big Jeff · Post by **Big Jeff** » Fri Sep 12, 2008 4:16 pm

i was driving home when i felt there was something wrong with the car,

so i drove the car up a motor way and could not get pass 80 mph, 4000 rpm in 5th gear,

spoke to my friend and he said it prob the cat and said that i should put it in a bag get a metal pole and start smashing the inside so it become a decat

Rodd1s · Post by **Rodd1s** » Sat Sep 13, 2008 11:52 am

what other symptoms are there... or will the car simply just not move? what bout downshifting to 4th... what happens then? cos 4th gear should take you up to around 110mph - i know mine does.

Big Jeff · Post by **Big Jeff** » Sat Sep 13, 2008 12:19 pm

i can rev it to the limit in 1st,
then it starts to play up once its get passed 3000rpm it feels like there no power i open the throlle the engine repones but nothing

does anyone have a pic what a cat should look like when u look in the pipe

Pir0 · Post by **Pir0** » Sat Sep 13, 2008 1:06 pm

Main cat should have squares, that look like honeycomb in it. Think the precat or 'halfcat' has swirls of honeycomb. Either or, one of them has sqwirls, ones square. Just looks like very fine slits of metal.

Did you not say your car was running rich a while ago? Running rich can actually melt the cats if it's severe or prolonged enough, aka, bad 02/lambda sensor can fuck stuff up in the cat. If it's melted and you're trying to push exhaust gases through a lump of solid metal at points, it'd surely restrict gas flow outta the exhaust, which will seriously limit the top end.

http://www.davedragon.org/Photos/BMW/GS ... MG1919.JPG swirly one.

Normal one.

Big Jeff · Post by **Big Jeff** » Sat Sep 13, 2008 1:35 pm

i think it trying to come out of the exhaust i will take i pic in a min

daewoomofo · Post by **daewoomofo** » Sat Sep 13, 2008 2:09 pm

if it was running rich you prolly clogged the cat up with carbon (from the un burned gas) running lean would cause the exhaust gas to be too hot and could cause it to melt

Big Jeff · Post by **Big Jeff** » Sat Sep 13, 2008 6:04 pm

it is the cat i tryed to get it of the car but it won't fuck one nut (no head) might get a blow torch tomorrow,

so i remove the centre silenter look in the cat where it should look like this
http://www.davedragon.org/Photos/BMW/GS ... MG1919.JPG

i was turn like 90C so it block the exit, i have tempory fix it by using a screwdriver to turn it back

Big Jeff · Post by **Big Jeff** » Sun Sep 14, 2008 5:22 pm

i was serching ebay and found this would anyone know if it would fit?

http://cgi.ebay.co.uk/HONDA-PRELUDE-92- ... 286.c0.m14

Daniel · Post by **Daniel** » Sun Sep 14, 2008 5:45 pm

This one from Ebay is a empty tube. Not a cat. And it seems too short. Don't you need a 390mm long between flanges?

Daniel

daewoomofo · Post by **daewoomofo** » Sun Sep 14, 2008 9:22 pm

if your gonna remove the cat why not just get a piece of exhaust pipeing and replace the cat with it, instead of buying some thing your not sure will fit.

Rodd1s · Post by **Rodd1s** » Mon Sep 15, 2008 10:32 am

the flanges on that prelude decat pipe looks different to that of the lanos' exhaust, doubt it'll fit.