I have an 87 rx-7 thats been street ported and lightened.....i have installed the new engine but seem to be plagued with all these timing related problems (bad mileage,no power, running rough and irregular over heating) now is there a way to time it without a timing light, and if not, is there a trick to timing it with a light.
im sorry for the noobish questions but i spent a lot of money on this new engine and i have yet to get the preformance i should.....thanks for understanding

 

oh i forgot, its also revving a little high....somewhere around 1500-1100

 

I'd suggest you do a compression test before anything else.


-Ted

 

Has the engine been broken in? I thought that I had read that new rebuilds should be revving over 1000rpm for the first 2000 miles (until the engine is fully broken in). Once you pass your 2000 mile mark, then you are supposed to try to adjust your idle and stuff like that.

 

Yeah,, your description is a little vauge here dude..

1) Fresh rebuild with 0 miles on it??????????????? or new previously running motor??/

2) Poor mileage??? ummm.... a ported motor is going to get shitty mileage.. how shitty are we talking about????

3) Timing..... there's no real "trick" to it... you warm the car up, make sure its idleing around 800 RPM, hook up a timing light to the battery and to the L-1 coil and check that the pin is lined up with the yellow mark on the main pulley... (if the mark is yellow anymore, its the mark to the right of the two on the pulley)

if its not, then you move the CAS around until it is.

Then you hook it up to the T-1 and make sure the the pointer is on the red mark (or the one to the left of the two)

There are no marks for the rear rotor, but you can hook up the light to those plug wire to make sure that they are firing..... the rear rotor CANT be out of time from the front rotor or the motor would not spin, you just have to make sure that the plugs are firing......

 

The initial set coupler must be set according to the Haynes manual. Otherwise the timing will jump with any small engine speed change.

 

Hmmmmm FSM doesn't mention it....

OK.. Wait... the s5 FSM does.... says its a green 1-pin connector.... must be grounded to the body to set timing

Hmmmmmm... I know my s5 GTU had this.. don't remember it in the s4 TII before the haltech.........

SOOOOoo we know he has an s4.... does he have this connector, or did they just misprint the s4 FSM???????????????