car will not idle with turbo
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car will not idle with turbo
Hey all, just installed a turbo on my 94 NA and since I have put everything togher it will run strong for like 20 sec everytime then die, by mistake just hapened to unpulg the maf sensor and the car will idle fine but will bog down when I hit the gas, I installed bigger injectors if that has anything to do with it?
Thanks
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Re: car will not idle with turbo
You can't just plug a turbo on a NA car and not change the engine management and expect everything to work ok. You might go in depth into what you did, and that will make it easier to diagnose the issues.waldo320 wrote:Hey all, just installed a turbo on my 94 NA and since I have put everything togher it will run strong for like 20 sec everytime then die, by mistake just hapened to unpulg the maf sensor and the car will idle fine but will bog down when I hit the gas, I installed bigger injectors if that has anything to do with it?
Thanks
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No you can't have one
05 GD-STI
01- RS- Swapped-07 STI
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93 SS- "the original Robtune" (now in new hands)
Well here I go I have a s afc first gen not hooked up right now, vf11, custom side mount intercooler, sti 480 injectors, 91 legacy manifold and down pipe wrx up pipe, turbo xs blow off, custom 2" intercooler piping, the three 1/2" vacum lines that were on the stock intake pipe are now T'ed, and the one 3/4 breather has k&n filter on it, oil feed from filter attachment return into oil pan, cooling feed and return from heater core, other than that stock 94 NA MAF that will not idle without the AFC hooked up, other than that its a stock 94 BC
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It's the bigger injectors. You are overfuelling at idle and part way up the RPMs. We had this problem when we built the Ej20/Ej22 hybrid. And we were only running Ej22T injectors. If you gave it a little gas, you could force it to keep running. It would make good power from 2000-4000rpm and then it would just bog like nobody's business. There was nothing we could do about it until we got the E-manage installed and tuned.
Our temporary solution was to go back to the NA injectors. This made the car driveable. It would detonate terribly about 4500rpm and higher.
Also, you now need to change out your plugs. I guarantee they are fouled...
Our temporary solution was to go back to the NA injectors. This made the car driveable. It would detonate terribly about 4500rpm and higher.
Also, you now need to change out your plugs. I guarantee they are fouled...
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1973 Porsche 914 2.0 l -Suby swap pending
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2000 2.5RS daily driver.
1999 2.5RS w/ 50+ extra whp
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Re: car will not idle with turbo
the car diesing when you come to a stop is probably your BOV. It can't be open to the atmosphere, you need to route it into the intake ducting pre-turbo. If it's open to atmosphere, this is the problem. Also, make sure you have the air line to the Idle air control valve correct.
I ran my MAF in blow through mode right before the throttle body and ofter the BOV, so I can release my BOV to atmosphere since hte MAF didn't read the air yet. Seems this works better on the NA management also as it has no function to compensate for the change in air density after compression and charge air cooling. Putting it in blow-through mode alows the MAF to read more acurate air flow.
I ran my MAF in blow through mode right before the throttle body and ofter the BOV, so I can release my BOV to atmosphere since hte MAF didn't read the air yet. Seems this works better on the NA management also as it has no function to compensate for the change in air density after compression and charge air cooling. Putting it in blow-through mode alows the MAF to read more acurate air flow.
P just bolted a turbo on mine, verything else stock... it's awsomedscoobydoo wrote: You can't just plug a turbo on a NA car and not change the engine management and expect everything to work ok. You might go in depth into what you did, and that will make it easier to diagnose the issues.
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No, I mean, are you pulling fuel via Engine Management.
With 370 cc injectors, I ran WAY rich at idle. Then when I bumped up the base fuel pressure, the car will barely run.
I pull a fair amount of fuel out at idle, and just cruising around. I bet if you were to go driving, you would get about 10-12 mpg right now.
With 370 cc injectors, I ran WAY rich at idle. Then when I bumped up the base fuel pressure, the car will barely run.
I pull a fair amount of fuel out at idle, and just cruising around. I bet if you were to go driving, you would get about 10-12 mpg right now.
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1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
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1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
other than the car not idleing at all as soon as I hit boost on my guage I here a bup bup bup or what I am taking as a fuel cut really havent taken out for much more then around the block due to it stalling every time I stop and havent spent much time trying to get the afc working since I cant find the right wiring digram for my car so hopefully be able to post more tommorw night on the afc prob
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I suspect you are actually getting the opposite of fuel cut, you are getting WAY WAY to much fuel. Or so I suspect.
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
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Just put the stock injectors back in for now and see if it runs fine, it should, just dont boost over 5 psi!
Or get smaller injectors. You can get 370 cc nissan injectors for $100 or so on ebay and they are good for about 12 psi (with a RRFPR)
Or get smaller injectors. You can get 370 cc nissan injectors for $100 or so on ebay and they are good for about 12 psi (with a RRFPR)
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
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Until you get your fuel problems solved, ie, get it back to stock fuel at idle, I don't think you are going to be able to tell anything.
Do the stock fuel injectors and then go from there. Its a pain in the ass, I know, but you need to just get it running to start.
Do the stock fuel injectors and then go from there. Its a pain in the ass, I know, but you need to just get it running to start.
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
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http://cgi.ebay.com/ebaymotors/NISSAN-S ... enameZWDVW
http://cgi.ebay.com/ebaymotors/370cc-Fu ... enameZWDVW
http://cgi.ebay.com/ebaymotors/370cc-Fu ... enameZWDVW
Reddevil, Awaiting new heart, will it ever happen?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
1990 wagon, EJ25 12.3 @ 116.5 FAST Family wagon getting new motor soon
1992 wagon, wifes daily, high compression
1992 Touring wagon, should I keep it?
quick question just happen to be installing a new turbo water pump to cure my thermostat rubbing on the manifold problem, had some $ from christmas and decided to run out to summit and buy a unorthodox crank pulley, if retard my timing some by a crank adjustment would this cure the excess fuel problem??
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Hey update, reinstalled the stock injectors, double checked timing, and there is one foot flame comming from the down pipe, result fuel trims messed up since maybe the ecu isnt use to the stock injectors and is still thinking sti yellows, but can not get the afc working right have it hooked up right but still does not work, OH YAH the car will still will not idle but tonight I am going to reset the ecu and see what happens, sugestions help!!!