I just picked up a 1993 fd and am still quite new to the scene.
I have done lots of research before buying my first rotary.

Couple days ago i picked up a fd with 186,xxx KM *im from canada *100,xxxmiles? with 10,xxxkm on a rebuilt engine for 12000$. here is the modlist it came with:

-Exterior-
99 spec front lip ($200.00)
99 spec rear tail lights ($300.00)
feed side skirts ($300.00)
smoked front turn signal lights ($100.00)

-Suspension-
Tein Monoflex adjustable coilovers
Cusco steering linkage
Cusco rear strut bar
Greddy front strut bar ($150.00)
ST Front and Rear Anti Swaybar set ($330.00)
17" OZ FUTURA 3 PIECE rims
Brembo Big break Kit ($2000.00)

-Inerior-
Compustar Alarm with turbo timer and Remote start
Blitz turbo timer
RE-Amemiya D1 Spec Shift Lever ($80.00)
Sparco race seats and rails ($1600.00)
Sparco shift ****
Sparco shifter boot ($150.00)
MOMO steering wheel ($160.00)
AEM Digetal wideband A/F Gauge ($300.00)
Oil temp and water temp gauge ($140.00)
Optima Yellow top battery (relocated to the rear) ($200.00)

-Motor-
New Engine wiring harness ($650.00)
3mm apex seals
polished intake manifold ($145.00)
Greddy polished intake elbow ($200.00)
Greddy type RS BOV (200.00)
polished air filter piping ($40.00)
Blitz BOV
Apexi grounding kit ($210.00)
HKS Twin Power Rotary Ignition ($350.00)
Apexi Power FC with Comander ($1200.00)
Unorthodox Under drive pully kit
KOYO Racaing Aliminum rad ($350.00)
Daul Electric Fans
CoolCharge lll intercooler with intercooler ducting
Daul Electric Fans
After Market Air filter box, air filters and plumbing
ACT Street Clutch Kit ($450.00)
ACT Prolight Flywheel ($230.00)
ACT Counter Weight ($115.00)
Denso 280LPH Fuel pump ($185.00)

-Exhaust-
3" exhaust
highflow cat
Racing Beat muffler and down pipe
Effni y pip ($280.00)


The owner who i had baught it off of did not do any of these mods, he had owned it for 3 years. The owner before him had done most of the work at a pretty well known rotary shop.

My question now is, since i picked up this FD iv been having some issues with idle. it sits around 1700 RPM and doesnt go down. Could this be because of a vacuum leak? I took it in to the shop today and the mechanic told me it MIGhT be because the seller turned up the idle to hide the irratic idle of a blown engine seal or low compression.. however the car seems to run fine in my opinion...
Also it tends to backfire quite a bit during low RPMs while in 3rd gear. the ATF ratio shows 14:7.. but after driving it, hits around 17: - 18: .. Could this mean it is running too rich or lean? Should i be worried about detonation?

I do have a apexi commander in the car aswell.. Im crossing my fingers that it isnt a blown engine or low compression im still waiting to hear back from the mechanic.

Could you guys possibily help shed some light?

Thanks in advance

 

found out it was really low on compression.. 70 and 28.. and 90 .. ugh
what happens if i keep drivin it on low compression? should i drive it till it drops before the rebuild?

 

I'm not understanding your numbers, but regardless, you won't harm anything by running the engine with low compression. I think the biggest issue will be hard starting after the car is at operating temp. The plugs may foul.

 

are you positive that its a rebuilt engine? he couldve said that to get you to buy the car.

 

Any other possible scenarios? I have a similar case, any help would be awesome!