slidewithstyle

Hey guys i was just out warming my car up and when i started to back out of the garage it started running really rough. so i revved it a bit and it backfired loudly and it almot sounds like its running on 1 rotor. The oil pressure was good,battery was good. I dont a have a hookup for my phone but if your phone can get videos pm me your number and ill send it to you. Im worried that its blown i just bought the car a couple month ago. I guess i really have to go and get a compression tester now. I guess if it is Blown i can finally start my turbo build I wanted to not have the car out of commision though.

Thanks
Austin Leiphart

Detriuch

iTrader: (1)

hmm. mine did that a few times when it was cold one morning. i think my trailing ignition and plugs are junk though. i held the gas down a tad and it cleared up after a few seconds. did a comp. test and it came out fine

Kentetsu

Check for spark first, then the fuel level in the float bowls. A blown engine would be the last suspect, but even a ghetto compression test could tell you for sure.





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slidewithstyle

revved it all the way to 7500 and it didnt clear up at all. I just sounded like an m80 going off in my exhaust pipe when i let off. And when checking for spark as long as it sparks when the plug is grounded it should run ok right?

slidewithstyle

Ok i checked the plugs and they were terrible looking so i went to pep boys and got some new ones. It still runs like crap but i noticed a hissing sound after i turned it off. It seem to be coming from the master cylinder/ brake booster area. would that possibly cause this.

Jibaro 12A

iTrader: (8)

[QUOTE=Kentetsu;10465396]Check for spark first, then the fuel level in the float bowls. A blown engine would be the last suspect, but even a ghetto compression test could tell you for sure.

+ 1 I'd start here first. Do a compression test!

FunK73

iTrader: (6)

pull your plugs, have someone else crank your motor over and listen for even-ish hissing and popping from both rotors. If you only hear it from one, or obviously uneven ones, bad news bears.

PercentSevenC

Yes. If you've got a nasty vacuum leak, it can cause it to run like absolute crap until it's fixed.

kutukutu1

iTrader: (5)

vaccum leak will make it run like crap

DivinDriver

iTrader: (15)

Cap off your booster feed line to test this.

roondawg

iTrader: (1)

Also check your ignition coils to be sure you actually have spark in both chambers. Sounds more vacum related.

slidewithstyle

Guys i think its a very bad vacuum leak. My emissions block off plate is leaking and where the carb mounts to the intake. I redid all the vacuum block offs and the car doesnt backfire like crazy now. I just think its weird how it was idling and it all of the sudden started this.

PercentSevenC

It happens. One time when I went to a meet in the FB, everything was working great when I shut it down. Then when I fired it back up to leave a few hours later, it was running horribly and wouldn't idle. Turned out a vacuum cap had broken. Patched it up with duct tape and drove it home.

slidewithstyle

Mine still wont idle i trhink the carb needs to be rebuilt by the way its acting. I ordered are build kit from autozone and im going to make a gasket for the emissions block off plate.

DivinDriver

iTrader: (15)

If you're not using locknuts on the block-off plate, they can easily vibrate loose enough to leak; especially without a gasket.

slidewithstyle

Well guys i thought id update and say i found the problem. It was the 1/2" vacuum port right next to the exhaust. i guess the cap burnt off. I still think its hilarious that I found this after I rebuilt the carb and regasketed all the blockoff plates. But now the carb doesnt leak and i guess its all good to go for my turbo project now

Kentetsu

lol, thanks for the update. Glad you got her sorted out before you replaced the motor.