Still having issues after Procharger install
#1
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As some of you may have read, I'm having some issues getting the car to run right after my D1SC install. The Procharger is installed on a stock internal engine, with 60lb injectors, Warlboro 255 fuel pump, and NGK TR6 plugs being the only other new mods outside of those in my sig. In a nutshell, here is the problem...
I got a base tune from Frost to get the car running so I could drive it to get it tuned. I hooked the computer up, and tried to start the car. It took several tries, but finally started. It idles rough, but I wasn't alarmed at the time...figured it would be pretty normal with the new tune/mods. After warming to operating temp, I tried giving it light throttle...the engine stalled, but slowly brought the rpms up to match the throttle position. I let the engine idle for a while, thinking the PCM might need to learn fuel trims, etc, but the conditions still haven't gotten any better. If you hold the throttle at, say, 2000rpms, the engine will hold speed for a couple seconds, but will eventually drop 2-300rpms and surge back up. It surges badly at basically any held throttle position, and stalls every time you give it gas off idle.
I threw a p0300 code when I first fired the car up after installing the computer, which I looked up (random misfire) and then cleared. I have not gotten a code since, but the symptoms still remain. I have checked every possible angle for a vacuum leak, and hosed pretty much the entire manifold and every hose and connection with carb cleaner, but to no avail. I checked the vacuum on the gauge, and it shows 20 and holds steady...no bouncing around or erratic readings. Fuel pressure is at 63 at idle, and I've yet to see it drop under 60 at any throttle level. I pulled the plugs/wires tonight, and rechecked the gaps. Plugs are gapped at .030, but look incredibly clean. There is virtually no sign of combustion anywhere on any plug, especially the tip, with the exception of a BB-sized brown spot on the ceramic of each plug. There is no soot, or even a tan or white mark to be found on any plug.
I'm stumped on this. I emailed Steve at Frost, and he's certain its a physical issue and not in the tune. I have no reason to doubt this, but at the same time have no idea where to look next. This car ran like a top before I started the Procharger install, and I've double and triple checked the installation of all components, including bypass valve. The only things different on the engine itself are the injectors and the plugs.
Any help or suggestions here would be greatly, greatly appreciated.
I got a base tune from Frost to get the car running so I could drive it to get it tuned. I hooked the computer up, and tried to start the car. It took several tries, but finally started. It idles rough, but I wasn't alarmed at the time...figured it would be pretty normal with the new tune/mods. After warming to operating temp, I tried giving it light throttle...the engine stalled, but slowly brought the rpms up to match the throttle position. I let the engine idle for a while, thinking the PCM might need to learn fuel trims, etc, but the conditions still haven't gotten any better. If you hold the throttle at, say, 2000rpms, the engine will hold speed for a couple seconds, but will eventually drop 2-300rpms and surge back up. It surges badly at basically any held throttle position, and stalls every time you give it gas off idle.
I threw a p0300 code when I first fired the car up after installing the computer, which I looked up (random misfire) and then cleared. I have not gotten a code since, but the symptoms still remain. I have checked every possible angle for a vacuum leak, and hosed pretty much the entire manifold and every hose and connection with carb cleaner, but to no avail. I checked the vacuum on the gauge, and it shows 20 and holds steady...no bouncing around or erratic readings. Fuel pressure is at 63 at idle, and I've yet to see it drop under 60 at any throttle level. I pulled the plugs/wires tonight, and rechecked the gaps. Plugs are gapped at .030, but look incredibly clean. There is virtually no sign of combustion anywhere on any plug, especially the tip, with the exception of a BB-sized brown spot on the ceramic of each plug. There is no soot, or even a tan or white mark to be found on any plug.
I'm stumped on this. I emailed Steve at Frost, and he's certain its a physical issue and not in the tune. I have no reason to doubt this, but at the same time have no idea where to look next. This car ran like a top before I started the Procharger install, and I've double and triple checked the installation of all components, including bypass valve. The only things different on the engine itself are the injectors and the plugs.
Any help or suggestions here would be greatly, greatly appreciated.
#5
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Well if you told him the rail pressure was 63psi then I doubt that is your problem. If you have a stock regulator you cannot adjust pressure anyway. As far as the MAF, the only thing I can think of is to try and clean it or try another one. They sell MAF cleaner at auto parts stores.
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#8
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Wires are in good shape, and I have tried two sets.
I'm not throwing a code anymore. I threw the code early last week and haven't thrown it again since.
#10
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Seems like if I had a vacuum leak, I wouldn't be pulling 20 at idle. I'd also think the reading would be bouncy and erratic, which it's not. I could be wrong on that, though. Honestly, I don't even know where to begin looking for a leak again...I've sprayed damn near a full can of carb cleaner on every seam, hose, joint, and fitting on and around the intake manifold and every vacuum hose, and found nothing.
Will definitely be checking the MAF, though.
Will definitely be checking the MAF, though.
#14
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I borrowed a friends scanner and wrote everything down. Numbers are really erratic and jumpy...no codes present and none pending.
Calc Load: 2.3%
STFT B1: -3.1 to -4.6 (jumps around)
LTFT B1: 0
STFT B2: -5.2 to -7.8 (jumps around)
LTFT B2: 0
MAP: 9.1
RPM: 800ish
Spark Adv: 20-22
IAT: 59
MAF: .882-.951
TPS: 0
O2S B1 S1: .050 - .865 (jumps around a lot)
STFT B1 S1: -5.4 to -7.8 (jumps around)
O2S B1 S2: .440 - .805
STFT B1 S2: NA
O2S B2 S1: .045 - .845
STFT B2 S1: -6.2 - -9.3
O2S B2 S2: .440 - .825
STFT B2 S2: NA
Fuel Pressure (on gauge): 62psi
Vacuum: 20
Curious to hear anyone's thoughts on this...