Help! Backfire blown exhaust!

[amazingdave]

Hiya,

My van started being tricky to start a couple of weeks back, with the odd little backfire just as she started, then running like a pig until warm after which it runs perfectly normally all day even after 8 hours standing...

However today the backfire was 9/11 style and has blown the end off the previously good back box... A*se.

Any ideas whats causing my cold start pyrotechnics so i can remedy it before I (a)Do any more damage and (b)Get arrested under the prevention of terrorism act...

Whoops should of said... DG 1.9 1989. bright orange...

Ta, Dave.

[Andy syncro-nutz]

Stick to the basic's! its probibly just dampness in your dizzy cap! Wot engine you got?

[Andy syncro-nutz]

[quote="

Whoops should of said... DG 1.9 1989. bright orange...

.[/quote] oops !

[Mocki]

timing?
Ignition components?
Vac pipes?

[j_robi]

got a similar problem here mate. getting corcened about blowing a hole in the exhaust. been getting worse for the last month, then the other day just wouldnt start at all, backfire backfire!
going to have a look over her tonight

[amazingdave]

Cheers for the replies...

I'll have a look at the basics first as you suggest....

j_robi Watch out for your backbox! mine was in perfectly good condition till it blew apart

Dave.

[j_robi]

solution= new spark plugs!

[amazingdave]

yep, I replaced the plugs, leads and cap just to be on the safe side, all sorted!

however welding the exhaust was a bit sketchy... the exhaust was obviously filled with a good bit of fuel from me starting it up repeatedly cos a big blue flame shot out of the tailpipe and nearly took out my eyebrows as soon as I started welding.