ducerx7

i replaced the engine in my car and it cranks and wont start checked fuel and spark and i know it has compression by the why it trys to start changed the plugs any ideas

HKSpoweredFC3S

Check your TPS to see if it has a full connection.

Also, we need to know what series it is and if its turbo or not.

RX7 JIMMY

whats TPS?? where is it located?

misterstyx69

iTrader: (142)

flooded..and check your afm connection

HKSpoweredFC3S

TPS = Throttle Position Sensor, you will find it in front of your throttle body. (connection could have loosened) or the sensor is bad.

And i think its just flooded too.

ducerx7

the tps is plugged all the plugs are good i was cranking it for awhile i was thinking it was flooded so i pulled the fuel punp relay and the plugs and cranked it to get the fuel out of the cylinders and then reinstalled the plugs and the relay but still nothing
im going call jim at jpr and see what he thinks unless anybody else has anymore ideas thanks for the feed back guys

Scrims

iTrader: (2)

cylinders? uh-oh....


You check your compression with a gauge. Bad compression will cause all kinds of problems, including a really hard time starting, even if it's really close to starting.

Have you tried bumpstarting?

Aaron Cake

iTrader: (1)

Check the basics (which oddly, no one has suggested).

Are you getting spark?

CAS in the correct place?

Are you getting fuel into the engine?

If those three things are correct, then it will start. If it's a fresh rebuild, it may require a push start.

HKSpoweredFC3S

Indeed.

Burnin_streets

How fast do you need to be going in order to push start? Sorry to thread jack, but I'm having the same problem!!!

kmferzola

check your ignition relay....

HKSpoweredFC3S

A push start dosnt take much, just enough to where you can let the clutch out in first gear and have enough room for it to have time to fire off.

Burnin_streets

Let it out in first? I've been doing it in second.

HKSpoweredFC3S

Your right, second gear. My bad.

Burnin_streets

booo, you got my hopes up. I thought I was doing it wrong!

ducerx7

ok when the car is warm it runs and it runs fine idles good and smooth but after the car sits all night and i come out in the moring it dont want to start just cranks and trys to start after about 30min-45min of cranking sometimes i can get it to start but the funny thing is if i pop the clutch it will start right up and run fine like nothings wrong any ideas??/




87 n/a stock

Aaron Cake

iTrader: (1)

1st, 2nd, whatever. I usually use 1st. Generally I have it pushed up to about 20, then slip the clutch.

ducerx7

ok now i found out another thing when i crank the car only one or two times then leave it sit for about 20 mins and then try to start it again it starts right up and runs with no problem and one of my friends that does rotarys told me to do a vaccum test off a intake manifold port and i did he said my vac should be like 16-18 psi and when i did it the car has about 33psi ?? does that mean anything??

Aaron Cake

iTrader: (1)

Vacuum is not measured in PSI generally. It's measured in KpA or inches of mercury. 33" is also almost impossible for a rotary to generate at idle. You might approach that number during a high RPM decel.

A vacuum leak is a valid guess though.

Fevish

I am having these ezact same problems, the car has been working fine other than the occasional hot start-flood, but then suddenly one morning the car doesn't start, but once the temperature gets warmer, the car fires up like nothing happened, but then the next morning, no start.

I will keep you updated on my progress with this problem.

*edit
I forgot to add that jumpstarting always works, and sometimes cranking the **** out of it with my egi fuse d/c works.