Issues after new Rebuild please help

[captainlovepony]

Hi everyone,
        I would really be happy with your knowledge.
I have recently had my late Rx7 which is completely standard Rebuilt at a engine builder but i have concerns.
1, The engine now hunts which it never did before but was told this will settle on its own after some miles?
2, Smokes on start up and smell of fuel.Never did this before not so bad?
3, Juder at low speed kind of like kangeroo petrol?
4,After running and switch off engine i turn on ignition again the cooling fan comes on?
5,Had to have CAT removed as caused part of engine problems,and told should be no issues with this other than higher emissions?
 
Im very worried about this please can you advise me if these things are normal or not.
 
Thanks to you all for your help.

[Timmy]

1, The engine now hunts which it never did before but was told this will settle on its own after some miles?
Idle need some adjustment, during the run in your compression gets better so it needs setting up again possibly.
2, Smokes on start up and smell of fuel.Never did this before not so bad?
Smoke on start up is normal fresh rebuilds are worse should clear up once warm
3, Juder at low speed kind of like kangeroo petrol?
At low rpm??
4,After running and switch off engine i turn on ignition again the cooling fan comes on?
Sounds normal to me
5,Had to have CAT removed as caused part of engine problems,and told should be no issues with this other than higher emissions?
No you need a aftermarket ecu incase the boost spikes.

[captainlovepony]

Thanks for your response,sounds like things arent so bad after all.
The revs were low and i was in high gear but does it in all gears.
Also how much are after market ECU?
 
 Cheers:)

[RobMatthews]

the ecu of choice is normally the apexi power fc and comander,prices alway stay high even for second hand ones,expect to pay no less than 380 quid and up to £600 new i think.

on another note,where in cornwall you from?

[captainlovepony]

the ecu of choice is normally the apexi power fc and comander,prices alway stay high even for second hand ones,expect to pay no less than 380 quid and up to £600 new i think.
 
on another note,where in cornwall you from?

Redruth mate.

[RobMatthews]

have you got the standard black one down there?if not that means there are actually a few of us around as i know of a silver one from hayle way too.

[Bulla]

Hi everyone,
        I would really be happy with your knowledge.
I have recently had my late Rx7 which is completely standard Rebuilt at a engine builder but i have concerns.
1, The engine now hunts which it never did before but was told this will settle on its own after some miles?
2, Smokes on start up and smell of fuel.Never did this before not so bad?
3, Juder at low speed kind of like kangeroo petrol?
4,After running and switch off engine i turn on ignition again the cooling fan comes on?
5,Had to have CAT removed as caused part of engine problems,and told should be no issues with this other than higher emissions?
 
Im very worried about this please can you advise me if these things are normal or not.
 
Thanks to you all for your help.

Is there any reason why you wouldnt take up these questions with your Engine builder ?

Bulla

[captainlovepony]

i have and was told to run in for 1000 miles then bring it back.