[The_GRIZZ]

i posted this somewhere else but it aint a strange noise so....

2nd gear using the engine braking it sounds like it is backfiring, does this mean it's runing too rich on fuel or not getting enough or is there somethin else?

all knowledge and and unworldly ideas appreciated.

Grizz

[royce]

too rich
retarded timing
(most likely) hole in exhaust

[Damo]

royce wrote:

(most likely) hole in exhaust

Sierra or Vit? The spring loaded joing between the manifold and the exhaust pipe can let air in. I've had that problem before a couple of times.

[royce]

come to think of it mine is stuffed there with bits of bark jammed in it
I have aircon so keep the windows up, no noise

[Scrawny]

Windows up, air con on and stereo turned up loud.... problem solved!

Seriously though, probably not worth worrying about. If it gets worse then maybe start looking for a possible problem. If it starts spitting flames then get a flame arrester for the tip. If the exhaust falls off then there was probably a weakness there somewhere.

[The_GRIZZ]

royce it's not retarded timing my car IS Retarded

hole in zorst aint it either the noise is at the arse of the car also i looked for holes (not a good idea after going for a drive cause it is hot )

[royce]

did you measure the timing while going down hill?

jam a wet rag in the tailpipe at idle will show up any holes a lot easier

[neil_se]

Mine constantly pops/backfires every few seconds when engine braking in any gear.

[The_GRIZZ]

sounds like a plan royce could be holes on top (me stupid)

how do ya mesure timeing going down a hill?

[royce]

you cant, hence you cant discount it

unplug and block off the vacuum hoses to the dizzy, see what happens

[sp1086]

Most Vitara's exhaust manifold's are cracked between the 3 & 4 outlets.. This will cause the problem you are having.. Get a set of extractors for it and you'll be much happier.

[The_GRIZZ]

i gonna get a full zorst system fitted when i get the money

[Cade]

how do you stop this consistent back firing my new zook has this issue

only when changing down gears when i put the accelrator down again it back fires did not do it on the test drive only after about 40km of driving dammit

[The_GRIZZ]

Check all gaskets on ya zorst that was the prob with mine last time, now it backfires/burbles cause of the 2.5inch straight through

[Mike]

isn't popping/gurgling also caused by lack of back pressure?

[2stroker]

Yes Mike that's right, often when you fit a larger free flowing exhaust the reduction in exhaust velocity and backpressure will cause poping and gurgling sounds from the exhaust during deceleration.

[The_GRIZZ]

i have standard zorst up to the start after the cat if ya know what i mean