SERIOUSLY hesitating & back firing!

[Dizz]

I\'m having some serious issues with my FD, for a start it\'s ported with Garrett T78 turbo, fueling mods etc etc & Power FC.
 
The story with it is as follows: I have the car a week, I bought it with a freshly rebuilt engine (275 miles on it since rebuild to be exact) & it had been sitting up for nearly a year. I was informed not to drive it over 2,500 rpm untill it was run in (1000 miles) which is fine. I did a good 100 mile spin on Friday & it didn\'t miss a beat, ran perfectly. Then on Saturday I took a trip up to a retail park near me & had to go over a load of visious (sp) cobble stones which shook the crap out of the car & shortly after it started hesitating badly & back firing, then it would clear out & be ok. Then on Sunday I did the same 100 mile spin but this time when I slowed down for the toll bridge half way up the motorway it had no power & was jumping & banging when pulling away & again cleared itself out. When I got off the motorway & came to first lights it happened again but worse this time & couldn\'t get it to clear out by the time I got home (about 2-3 minutes). I had a very quick look & leads were still on the spark plugs etc. Can\'t figure out whats wrong & I\'m afraid to drive it now :reallymad
 
Any ideas???
 
I had thought maybe coolant temp sensor but it\'s reading perfectly on the hand commander :3Confused
 
Please someone help me :o

[neil_jdmr]

Hose dropped of the map sensor.

[Dizz]

Hose dropped of the map sensor.

I take it the Power FC uses the original MAP sensor, if so I checked it & the hose seams fine & block connector is on etc. Hand Commander is reading vacuum etc
 
Had thought possible coolant temp sensor but same again, it\'s reading fine on the hand commander

[Dizz]

Think I\'m a bit tired & repeating myself there lol

[bnaellis]

Possibl loose ground? check the one that connects to the side of the block where the air con bracket is.


rgds
Brian

[Dizz]

Possibl loose ground? check the one that connects to the side of the block where the air con bracket is.
 
 
rgds
Brian

Checked that mate, seems to be tights where it mounts to the engine block anyway. Luckily the air cons removed so wasn\'t hard to see lol. Thanks for the suggestion

[philiwily]

Possibly a spark plug issue as they can get a bit clogged after a rebuild.

[neil_jdmr]

Its not just bad fuel is it. Think fuel is pretty much useles ifits been standing for any lenth of time, try a good service, fresh plugs/oil/filter/fuel filter etc

[Jovic82]

i had almost exact same problem with mine, and after changing fuel pump & fuel filter it seems my coil pack was split and shorting out, may be worth checking that

[Dizz]

Its not just bad fuel is it. Think fuel is pretty much useles ifits been standing for any lenth of time, try a good service, fresh plugs/oil/filter/fuel filter etc

Don\'t think its fuel because the problem started with the same fuel in it that had been in it for the first 100 mile trip I did & it didn\'t miss a beat for that. I may check the spark plugs though
 

i had almost exact same problem with mine, and after changing fuel pump & fuel filter it seems my coil pack was split and shorting out, may be worth checking that

Could you see it split or do you mean split internally? Is the coil pack underneath the manifold/throttle body ye?

[AndyGen3]

Coil packers are under the Plenum/Intake bolted to the block :Thumbs-up

[Dizz]

Coil packers are under the Plenum/Intake bolted to the block :Thumbs-up

Thanks boss, any luck with the pulley?

[AndyGen3]

Do you have an impact gun ? Only way its coming off. . And its ok to use to as it was still connected and in use until i started to break the car. .

[DR SCHNITZEL]

did you find the problem mate

[Dizz]

did you find the problem mate

No :mad: Dunno whether to start testing coils etc or what
 
Any ideas?