no codes no missfire no power jts 156 - Alfa Romeo Forum
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(Post Link) post #1 of 1 Old 04-12-15 Thread Starter
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no codes no missfire no power jts 156

Hi all

I am new here, but been browsing threads in an attempt to get my 2004 156 jts to run properly.

I fitted a new thermostat when I first got the car, it ran cold, and decoked the inlet tract (there was a fair bit of gunk build up), and it ran pretty well after that, a bit flat at the top end perhaps, but not bad. Then I had a coil pack go, and ordered a replacement and fitted it.

Now it is absoloutely gutless, about 50 bhp if you ask me, with a very loud barking sound from the inlet. its got an after market conical air filter so you can usually hear a bit of noise when you floor it but now its ridiculous.

Any ideas before I give the car away? Its done 80k miles and isn't worth more than a few hundred quid, so if its cats, its good bye time.

Thanks all


Just noticed, I took it for a drive and its quicker on part throttle, like about a cm or so.
I ran fiatecuscan on it, the fuel pressure was hitting 100 bar, which is OK.

Last edited by Matt__S; 04-12-15 at 15:04.
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