Clogged Cat??

Boostmaniac · 04-16-2009, 05:41 AM

Quote:

Originally Posted by Rx-7fetish

It was throwing the theres an acorn under your intercooler holding your throttle body open code.............

LOL, I am still laughing about that.

Check it out, if it is pulling as strong as your NA till 6k, then you have some SERIOUS problems. There should be a HUGE difference starting at about 3k on how hard it pulls when the boost comes on. If you aren't feeling a power surge there at WOT, then you don't have any boost. Next, when the power cuts out, does it feel gradual or does it feel like you just stomped on the brakes. If it feels like you are braking hard for a second, you MAY be hitting fuel cut, which doesn't seem right if you aren't boosting, or you may be running way to rich because you have no boost.

Do this right now, literally as soon as you read this. Hop in your NA, go get the cheapest aftermarket boost gauge you can find, put it on your turbo and go for a spin. Take your vacuum reading at idle and put it in here, then see if it boosts at WOT, if it does, then watch and see what the gauge does at 6k. If you are boosting I expect your boost drops to 0. Also record what psi you boost if it does in fact boost. Put all the information in here and then we can proceed.

Also worth noting, the stock boost gauge is useless. Aftermarket in ANY situation here is the way to go. See what the beast is doing, then come back.

Also if you want to get crazy, disconnect your cat and run DP open for a run or two. That will cross out a few things on the to-do list.

Rx-7fetish · 04-16-2009, 02:28 PM

Got a gauge but have yet to hook it up, just got it. Im almost positive its boosting now, i replaced the alt, it was bad, and the fuel pump plug was not all the way together. Also changed oil and added more coolant, fixed a coolant leak and changed 02 sensor and plugs, thats all so far and it feels about 3 times better, i hauled ass down my driveway (its long) it pulled much harder now. Now the only problem is that it floods itself when i cut it off, and it sounds like it has an exhaust leak between the turbo and the engine, i found brand new un open turbo to manifold and manifold to engine gaskets in the spare tire well, along with brand new set of unidentified rear shocks. SOOOOO im doin pretty good. Ill get the gauge hooked up and get back to you tomorrow on all that, i have to get a shower and get to my public speaking class as of now, thanks for all the help guys

vex · 04-16-2009, 02:33 PM

Tune-Up's are awesome! Glad it all worked out.

Rx-7fetish · 04-16-2009, 06:09 PM

Class canceled, so i went to tinkering, im pulling 19 psi vacuum at idle and about 7 pounds boost tearing down my driveway. It still floods itself whenever i cut it off though, and it sounds like it has a bad exhaust leak between the turbo and engine, with the fcd and manual boost control, i think it should be pushing more boost but is losing pressure from the exhaust leak. It was running like crap, today i couldnt even get it to stay running, turns out that the hose clamp on the intake at the turbo was lose it was giving the car a funky reading for the afm, the numbers above are after i fixed that. Now i have rough idle, and flooding, its always had the rough idle so thats not a new issue. so the problems are going away as i tinker with you guys help. When i got it, it was so bad the owner flat out told me the engine was blown. That was just a busted heater core hose causing it to lose coolant and overheat. Im thinking the injectors are bad, if i pull the fuse and crank for a while then put it back, it starts.

So does any of that sound right or plausible???

Boostmaniac · 04-16-2009, 07:03 PM

flooding on hot starts is a VERY common problem for us.

19 vac and 7 boost is pretty good so far. Check your injectors to make sure some asshat didn't throw in some larger injectors without calibrating anything for them.

Also, does it still lose power at 6k still?

vex · 04-16-2009, 07:08 PM

Quote:

Originally Posted by Rx-7fetish

Class canceled, so i went to tinkering, im pulling 19 psi vacuum at idle and about 7 pounds boost tearing down my driveway. It still floods itself whenever i cut it off though, and it sounds like it has a bad exhaust leak between the turbo and engine, with the fcd and manual boost control, i think it should be pushing more boost but is losing pressure from the exhaust leak. It was running like crap, today i couldnt even get it to stay running, turns out that the hose clamp on the intake at the turbo was lose it was giving the car a funky reading for the afm, the numbers above are after i fixed that. Now i have rough idle, and flooding, its always had the rough idle so thats not a new issue. so the problems are going away as i tinker with you guys help. When i got it, it was so bad the owner flat out told me the engine was blown. That was just a busted heater core hose causing it to lose coolant and overheat. Im thinking the injectors are bad, if i pull the fuse and crank for a while then put it back, it starts.

So does any of that sound right or plausible???

I promise you... You are not pulling 19 PSI in vacuum. you're pulling 19 inHg

Rx-7fetish · 04-16-2009, 07:45 PM

Quote:

Originally Posted by vex

I promise you... You are not pulling 19 PSI in vacuum. you're pulling 19 inHg

Oh lol, well my gauge registered at 19, i just assumed it was psi lol and it got to 7 pounds of boost, also there was a check valve installed in the line that went to the pressure sensor. I cant find that in any diagram so i removed it and it seemed to run a little better

vex · 04-16-2009, 09:43 PM

Quote:

Originally Posted by Rx-7fetish

Oh lol, well my gauge registered at 19, i just assumed it was psi lol and it got to 7 pounds of boost, also there was a check valve installed in the line that went to the pressure sensor. I cant find that in any diagram so i removed it and it seemed to run a little better

Check valve?... Weird. But then again I'm sleepy. haha, goodnight.

Rx-7fetish · 04-17-2009, 02:23 PM

Five gallons of gas and 42 gallons worth of injector cleaner (2 bottles of super concentrated) later and it seems to have quit the flooding problem. Now i have an exhaust leak, bumper support to replace, rough idle, fix e-brake, and replace the exhaust. Its come a long way in just a few days from, "blown engine" to almost on the road

vex · 04-17-2009, 02:27 PM

Quote:

Originally Posted by Rx-7fetish

Five gallons of gas and 42 gallons worth of injector cleaner (2 bottles of super concentrated) later and it seems to have quit the flooding problem. Now i have an exhaust leak, bumper support to replace, rough idle, fix e-brake, and replace the exhaust. Its come a long way in just a few days from, "blown engine" to almost on the road

Just send your injectors out to be cleaned properly. All you've run through your injectors is basically alcohol.

Rx-7fetish · 04-17-2009, 09:29 PM

Im on a short budget lol, and the cleaner seems to have worked fine. Im going after the bumper support tomorrow. Then the exhaust leak. After thats fixed im gonna go after the rough idle, if its still there.

Rx-7fetish · 04-18-2009, 01:44 PM

Exhaust leak has been found but not fixed. the turbo is not bolted down on the manifold tight

. My dad wont let me work on it anymore until i finish installing the remote start on my moms mazda navajo.

Boostmaniac · 04-19-2009, 06:24 AM

I had a similar leak, turned out to be broken exhaust studs.

Rough idle means what? It is hunting, brapping, to low?

What RPM is your idle? Chances are high that you could benefit from a Rat's Nest removal and replacement of the remaining vacuum lines. Also, does your car still lose power at 6k RPM?

Keep us updated.

Rx-7fetish · 04-19-2009, 07:08 AM

no more power loss that i notice. Its just kinda stunmbles and misses a little thats all. I think its due too the exhaust leaking though. Other than that all i have left its fix the ebrake replace the bumper and bleed the brakes and its done. Oh i completely forgot i have to fix the driver window it goes down but not up

Rx-7fetish · 02-09-2010, 03:28 PM

UPDATE: gaskets are replaced, body is straight, still gotta fix brakes, bolt exhaust on, and make sure all my vac lines are were they are supposed to be, diagrams arent helping much. Had the same acorn problem again, i went straight to it this time, i cant for the life of me figure where this acorn came from

04-16-2009, 02:33 PM	#18
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. iTrader: (6) Posts: 2,113 Rep Power: 19	Tune-Up's are awesome! Glad it all worked out. __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

04-16-2009, 07:03 PM	#20
Boostmaniac Rotary Fanatic Join Date: Apr 2008 iTrader: (0) Posts: 182 Rep Power: 0	flooding on hot starts is a VERY common problem for us. 19 vac and 7 boost is pretty good so far. Check your injectors to make sure some asshat didn't throw in some larger injectors without calibrating anything for them. Also, does it still lose power at 6k still? Last edited by Boostmaniac; 04-16-2009 at 07:05 PM..

04-18-2009, 01:44 PM	#27
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Exhaust leak has been found but not fixed. the turbo is not bolted down on the manifold tight. My dad wont let me work on it anymore until i finish installing the remote start on my moms mazda navajo.

04-16-2009, 02:28 PM	#17
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Got a gauge but have yet to hook it up, just got it. Im almost positive its boosting now, i replaced the alt, it was bad, and the fuel pump plug was not all the way together. Also changed oil and added more coolant, fixed a coolant leak and changed 02 sensor and plugs, thats all so far and it feels about 3 times better, i hauled ass down my driveway (its long) it pulled much harder now. Now the only problem is that it floods itself when i cut it off, and it sounds like it has an exhaust leak between the turbo and the engine, i found brand new un open turbo to manifold and manifold to engine gaskets in the spare tire well, along with brand new set of unidentified rear shocks. SOOOOO im doin pretty good. Ill get the gauge hooked up and get back to you tomorrow on all that, i have to get a shower and get to my public speaking class as of now, thanks for all the help guys

04-16-2009, 06:09 PM	#19
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Class canceled, so i went to tinkering, im pulling 19 psi vacuum at idle and about 7 pounds boost tearing down my driveway. It still floods itself whenever i cut it off though, and it sounds like it has a bad exhaust leak between the turbo and engine, with the fcd and manual boost control, i think it should be pushing more boost but is losing pressure from the exhaust leak. It was running like crap, today i couldnt even get it to stay running, turns out that the hose clamp on the intake at the turbo was lose it was giving the car a funky reading for the afm, the numbers above are after i fixed that. Now i have rough idle, and flooding, its always had the rough idle so thats not a new issue. so the problems are going away as i tinker with you guys help. When i got it, it was so bad the owner flat out told me the engine was blown. That was just a busted heater core hose causing it to lose coolant and overheat. Im thinking the injectors are bad, if i pull the fuse and crank for a while then put it back, it starts. So does any of that sound right or plausible???

04-17-2009, 02:23 PM	#24
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Five gallons of gas and 42 gallons worth of injector cleaner (2 bottles of super concentrated) later and it seems to have quit the flooding problem. Now i have an exhaust leak, bumper support to replace, rough idle, fix e-brake, and replace the exhaust. Its come a long way in just a few days from, "blown engine" to almost on the road

04-17-2009, 09:29 PM	#26
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	Im on a short budget lol, and the cleaner seems to have worked fine. Im going after the bumper support tomorrow. Then the exhaust leak. After thats fixed im gonna go after the rough idle, if its still there.

04-19-2009, 06:24 AM	#28
Boostmaniac Rotary Fanatic Join Date: Apr 2008 iTrader: (0) Posts: 182 Rep Power: 0	I had a similar leak, turned out to be broken exhaust studs. Rough idle means what? It is hunting, brapping, to low? What RPM is your idle? Chances are high that you could benefit from a Rat's Nest removal and replacement of the remaining vacuum lines. Also, does your car still lose power at 6k RPM? Keep us updated.

04-19-2009, 07:08 AM	#29
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	no more power loss that i notice. Its just kinda stunmbles and misses a little thats all. I think its due too the exhaust leaking though. Other than that all i have left its fix the ebrake replace the bumper and bleed the brakes and its done. Oh i completely forgot i have to fix the driver window it goes down but not up

02-09-2010, 03:28 PM	#30
Rx-7fetish Blue Blur Join Date: Jan 2009 Location: Windsor iTrader: (0) Posts: 211 Rep Power: 0	UPDATE: gaskets are replaced, body is straight, still gotta fix brakes, bolt exhaust on, and make sure all my vac lines are were they are supposed to be, diagrams arent helping much. Had the same acorn problem again, i went straight to it this time, i cant for the life of me figure where this acorn came from