im about to buy an 87 rx7 n/a and it just turns over but wont crank. he claims to have done a compression test and it has something like 90 psi. is this good . im new to rotary . also he said the was running the water splashed into the engine bay and it wouldnt crank up anymore. do you think the problem is electrical or mechanical. since the car has ben sitting for a little while will it need a rebuild or something like that. i need your help somebody let me know something

 

please specify "turning over" vs. "crank" - do you mean it turns over by hand freely but the starter doesn't work

or

do you mean it cranks via starter but won't start?
thanks ~rich

 

the starter turns the motor over but it wont fire up

 

try a push start... It has worked for me before!!

 

the first thing to do is have him perform a compression test in front of you, how much does he want anyways for a non running 7? do a search on how to perform a compression test, it's important that you get it right and understand to look for 3 equal pulses around 90 or higher and both rotors, and it needs to be equal between the two rotors like front 90-90-90, rear 90-90-90. anything lower than 85 is going to be rebuilt in the near future

 

aslo check the EGI fuse in the engine bay

 

check your fundamentals, fuel and spark (let's assume the engine is getting air! lol) I found the easiest way to check for fuel is crack open the fuel pressure regulator on the rail and crank the engine - it should shoot some gas, at least get wet. (dont' break the O-rings)Check for spark, plug wire close but not touching a ground source - look for arcing while cranking. While you're at it, pull some plugs and look at them.

as for compression, I would think just listening to the exhaust pulses while cranking will give you an indication of the health of the seals? With strong, steady pulses I say put away that compression tester! ~rich

 

sounds like flooding 2 me pull the pulgs and EGI fuse and turn over then plug everything back up and then try

 

Using starter fluid can be a simple way to check for spark... if the engine tries to fire up on it, you've probably got spark.

Second, make sure the fuel pump is getting voltage... the simple way to do this is to jumper off one of the green check plugs in the engine bay (can't remember which one exactly, but it's greenish and has two plugs) and listen to whether the fuel pump turns on when you turn the car on (not cranking). If it isn't, make sure it isn't disconnected, for one thing... if it's not that simple, you're gonna have to check the FSM.

Even if the fuel pump works, you might have insufficient fuel pressure or flow. Also, you might need to replace the fuel filter (could be clogged). In fact, I'd do it anyway.

If you have fuel AND spark.... well then, maybe the AFM is no good... but more than likely, the engine is flooded. Take out the lower two spark plugs, pull the EGI and fuel computer fuses in the engine bay, and put some paper towels in front of the spark plug holes.. than crank the engine a bit... see if there's any fluids being spewed out.

Personally, when I took my engine apart, my entire exhaust manifold was full of coolant, since I had blown coolant seals.

 

thanks you all im gonna pursue the flooded option first

 

thanks you all im gonna pursue the flooded option first

 

I'm sure theres a ton of threads about this type of thing already.