Blown or Not Blown?!?! That is the Question!
 

2 Weeks ago I raced a the latest model Supra on the highway pushing 18psi. After the race, I felt a nasty rattle and when I was getting off the highway my car stalled but it was coasting. I turn the car on again and it sounded like shit. Hard to start, Lawnmower sound, popping, backfiring, no low end power, eating gas like crazy. OK I THINK ITS BLOWN I say to myself. I drive the car to my garage and stored it there and I cried all night :(
Today, I had some friends over that know alot about Rx7's and they asked me to turn on my car. The car cranked and fired up fine, idling around 1.5 rpm to 2 rpm, Aaron Cake the RX7 guru thinks that one of my fuel injectors were stuck open and that my 2nd rotor could of just been flooded. The car didn't make the sounds like it did before.
Whats up?!?!?! God I hope I don't need an engine rebuild.
Anyone go through a similar experience??
Btw I have an 89 Turbo II

Just get a compression check. It will tell you all you need to know. I blew my motor this summer and had similar symptoms as you. When I took it to get checked the mechanic said it was a stuck injector and wanted to clean the fuel system, but I told him I wanted a compression check. I blew a seal on the rear rotor.

My car idled poorly but still ran incredibly strong. Anyways, hope you get it sorted out and hopefully it is only a bad injector.

Mike

If you cant afford 100 bucks for a dealer compression test then get yourself a gauge type manual comression tester. This will atleast tell if your getting compression in both chambers.

Heya... I agree with the other posters... get it checked to be sure.

One time my car did the EXACT same thing... after some highway romping, it would barely run below about 2000 rpm and sounded AWFUL. It was also making some grayish/hazy clouds behind it that reeked like gasoline.

Know what it was? Turned out my air flow meter flapper got stuck all the way open. This made the car dump in tons of extra gas. I didn't even start checking that stuff until after I checked the compression though...

Good Luck... let us know...

Brian

87 TII
93 R1

That nasty rattle could have been detonation. Was it you or the Supra running 18 psi? If it was you, what fuel mods do you have?

I'm assuming you have a boost gauge if you do check vacume, if it's fluttering around you have a problem. Two motors I've dealt with had blown seals on rear rotor and both couldn't hold steady vacume, and both looked like they wanted to jump out of the engine bay they idled so rough.

Also check for gas in the oilpan, and/or coming out of the exhaust pipe. These are tell tale signs. Believe me I just had my engine detonate last weekend... why? because the octane (93) wasn't enough for the power being produced... this may be applicable to your case. also check your vacuum.
Good luck,
Ryker

Hi, my car has recently had similar problems, ran the car hard (have driven it harder before), when slowing down and driving at about 2000 revs, it was struggling not to stall. I pulled over, put it in neutral and the car was idling really rough at 500 rpm. it usually idles at 1500rpm. I managed to get the car home. turned it off then left it for a bit. when i came back it started up fine but as it got warmer it began idleing really low. now it doesn't even start. Any ideas any1. Im new to rx7's so haven't a clue of what it could be.

oh by the way, mine is a 1993 3rd gen efini