savageskaterkid Posted July 31, 2006 Share Posted July 31, 2006 I've been having a few problems on my N/a Turbo setup and I think i have a possible solution. I had a thread a few weeks back about a possible "mild" cam. I paid it no mind, and went along with the N/a-T project. Now I notice theres a nice little loppey idle and the car shakes nicely at idle. When I revv it the car revvs nicely just the same, but if I put it in gear, it all goes to crap. It really doesn't wanna go anywhere at all once in gear-I have to feather the clutch just to get it to move, and once driving it is a horrible experiance-it sounds like crap, and won't even hit the speed limit within 10-20 seconds. My possible solution is, could this cam cause some overlap which underload will cause the metered air to be blown out the exhaust and causing it to run wrong? Quote Link to comment Share on other sites More sharing options...
veritech-z Posted July 31, 2006 Share Posted July 31, 2006 I don't follow, did you GET a different cam, or do you have the stock non-turbo cam in your engine? Or do you have a mystery cam that might be aftermarket? Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted July 31, 2006 Author Share Posted July 31, 2006 Mystery cam, it may be stock or aftermarket, not quite sure-its got red painting to it, and I haven't seen that on any of my other Z cams. Well, took off the j-pipe and ran it as an N/a a few minuts ago and still runs the exact same. Just in case someone throws out that the motor is bad. I did a compression test the other day, and came up with 150psi across the board. With a low of 148psi and a high of 153psi-so the motor isn't shot. Could this be as dumb as a sensor? Quote Link to comment Share on other sites More sharing options...
veritech-z Posted July 31, 2006 Share Posted July 31, 2006 It's starting to sound like you either have a bad Mass Airflow Meter or you have a leak between there and the throttle body... Quote Link to comment Share on other sites More sharing options...
kcelectronics Posted July 31, 2006 Share Posted July 31, 2006 Have you checked the cam timing? Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted July 31, 2006 Author Share Posted July 31, 2006 I do actually have an extra AFM, but its a turbo piece-so I need to get an adapter of some sort to get it to fit. There is no leak, just because I have replaced the hose with a new piece, and nothing. Would cam timing cause it to run perfect without load, but cause the motor to goto crap once put under load? Actually, now that I think of it, it runs the exact same without the AFM conneted, so it may be a bad AFM, or connection. Quote Link to comment Share on other sites More sharing options...
kcelectronics Posted August 1, 2006 Share Posted August 1, 2006 Would cam timing cause it to run perfect without load' date=' but cause the motor to goto crap once put under load? [/quote'] Yes, I had a Ford V8 that had jumped a tooth (old timing chain) it idled perfectly but wouldnt pull "granny off a P!$$ pot"! Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 1, 2006 Author Share Posted August 1, 2006 wouldn't it be somewhat obvious though that my timing chain slipped a gear-wouldn't my compression somewhat suffer? Its at 150 across the board. Quote Link to comment Share on other sites More sharing options...
veritech-z Posted August 1, 2006 Share Posted August 1, 2006 If it runs the same with the MAF and without, I would start there. Or pull the valve cover and check your cam sprocket bolt, it's not unheard of for them to come loose. If you are using an NA MAF with a turbo, it's possible that it gave up on you sometime during that install. You're positive there isn't an air leak either on the manifold somewhere, or in that hose to the throttle body? Did you check it, or just assume that since it was pretty new it couldn't be bad? Quote Link to comment Share on other sites More sharing options...
veritech-z Posted August 1, 2006 Share Posted August 1, 2006 If it runs the same with the MAF and without, I would start there. Or pull the valve cover and check your cam sprocket bolt, it's not unheard of for them to come loose. If you are using an NA MAF with a turbo, it's possible that it gave up on you sometime during that install. You're positive there isn't an air leak either on the manifold somewhere, or in that hose to the throttle body? Did you check it, or just assume that since it was pretty new it couldn't be bad? Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 2, 2006 Author Share Posted August 2, 2006 I checked the rubber hose for cracks and holes, and tested for vaccum leaks with propane. Today I did verify that my Air Temp sensor in the AFM is bad, and I replaced it with the one from the Turbo AFM, everything else seems like its working right in the AFM-does this even sound possible? That the AFM is ok, but the Air-temp sensor is bad? Could this cause the motor to run crappy? Quote Link to comment Share on other sites More sharing options...
veritech-z Posted August 2, 2006 Share Posted August 2, 2006 Let me answer that question with this question: After you replaced it, did it run properly? Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 2, 2006 Author Share Posted August 2, 2006 With no exhaust, I can't run it this late at nite, I tend not to before the hours of about 9 am, and I won't start it after about 8:30pm. Gotta wait till morning. Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 2, 2006 Author Share Posted August 2, 2006 did make a very noticeable diffrence, I don't have to slip the clutch as much to move the car. Now I just gotta adjust the timing and Fuel pressure a bit more. Quote Link to comment Share on other sites More sharing options...
veritech-z Posted August 2, 2006 Share Posted August 2, 2006 So do you think it's fixed now, or is it still acting wrong? If it is fixed, still going to keep the turbo? Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 2, 2006 Author Share Posted August 2, 2006 turbo project is gonna be put on hold for awhile. I'm about to buy a header, and try and find a non-egr intake and start from there. Probly gonna go stand-alone and figure out all these problems and such. Quote Link to comment Share on other sites More sharing options...
veritech-z Posted August 3, 2006 Share Posted August 3, 2006 It's not that hard to block off the egr on a regular manifold if those non-egr castings are hard to come by. I actually cut the egr boss off of mine, and blocked it off with some epoxy. I haven't installed my megasquirt yet, so I can't really say if it's going to hold up or not, but I'll let you know when I find out. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted August 3, 2006 Share Posted August 3, 2006 Somehow I had managed top go through about 5 years (for sure) of emissions tests with my EGR blocked off by a cut-down tin can lid under the gasket. In the process of freshening the external parts, I removed the egr and saw it was stuck, so bought a new one. Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 3, 2006 Author Share Posted August 3, 2006 My EGR is blocked off anyway, its not a big deal to me, I just like the thought of not having it, it clutters the engine bay. And I like how the non EGR one just has the intake runners and nothing else. Well, with tuning, I have managed to screw the car up more, now it lacks power and acceleration, so I'm gonna set everything to stock settings and start from there. Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted August 10, 2006 Author Share Posted August 10, 2006 I got back to getting the Z to work again. I notice that if I stab the gas really quick, the AFM coughs and then starts to allow air in-so the car tries to stall, then revvs up. But I noticed if I jam a screwdriver in it so that it stays open atleast a little bit at all times, the throttle responce is amazing. What is causing this, is the tension in the AFM off? Quote Link to comment Share on other sites More sharing options...
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