Strange boost problem here

[CH152]

Before putting on a UIC and a 1G BOV my car was reaching about 14 pounds of boost. Now that i put on th etwo parts listed my car was running good or so i thougt. I took my car out for a hard run and i really didn't pay attention to my boost gauge until last night. I out ran a mustang by the way, anyhow, when i was paying close attention to the gauge i was like hitting 21 psi in 3rd through 5th. 1st and second spinned even when i was doing like 50 in 2nd. 1st and 2nd gear i am reaching about 16psi to 18psi. My problem is coming when the boost really kicks itself open through the final gears. If i get into it real hard the boost jumps from 0 to 21 not all in one move but it holds 21 psi when i want it to then slacks down to about 19.5-21 somewhere through there. I came back to the house and pulled the wires well two of them to check on the plugs again. The wire like sperated from the plug boot. I shoved them back together and started up the car and it sounded like a train, then the check engine light came on. I took them completly off and put on my old wires that i took off when i first bought the car, drove to the store excahnged the wires for new ones and the car ran better. But the check engine light still stayed on. And the car after changing the plugs also and wires the car still acted like it would quit then fire up again at HIGH boost. Could this be fuel cut? Do i need to rewire the fuel pump to help flow more fuel to the motor or what? It just does this when the boost is extremly high from 19 and up. Other than that and the check engine light that is my only problem. PLease let me know something guys. later

 

[InFlames]

You should not be running over 15-16psi at all. Anything above that is way too high for the stock fuel system. Make sure the vac lines on the wastegate are all hooked up and check your boost solenoid. If all is good, invest in a MBC so you can turn the boost down. You don't want to melt engine parts, right?

 

[CH152]

YEah you make a good point there, i will get one here soon, i have been meaing to but would that explain as to why the stuttering is there? once the boost gets that high? I'll make sure that i check all the vac lines and stuff. Thanks man. Oh yeah where exactly is the boost solenoid?

 

[ProStreetOnline]

Stuttering could be from knock/pulling back timing, etc.

What you are getting are boost spikes, because with your stock 2g BOV, it would leak boost, and with your new BOV, you are holding it.

Completely normal. Just watch EGTs and o2s, and make sure your car isn't knocking. Try to get a good boost controller too.

 

[RuBiCaNT5X]

What code was spit out with the CEL?

 

[InFlames]

Originally posted by CH152
Oh yeah where exactly is the boost solenoid?

It should be on the air box, that where mine was on my 1g. If you can't find it, just follow the vac line from the wastegate. It will lead you to the solenoid. Just be careful with that high boost for the mean time

 

[RuBiCaNT5X]

http://www.jumptronix.com/2g_go_faster/index.htm


Read that... Shows you exactly where the Solenoid is..

 

[CH152]

Hey guys,
THe engine light was coming from the plugs being fouled up by the the wires seperating when i tried to check on the plugs condition. after driving around for a while with new plugs and wires the light came off... Also for the knock i put in 3 bottles of octane booster in the car and the thing shut up and ran like it should. THe boost came down to a safer 18 psi in 1st and second and then 3rd through 5th the car would now slowy creep up to 20 not all at once like it did. I double checked every vac line and tightened up the inter cooler hose i think that was my problem casue i coated the inner part of it with oil so i could put it on easier. Also i took the car to a shop and had the injectors cleaned, that may have been some of the problem too. As for who i outran this time. 2001 porsche boxster. he let me drive it afterwards. that car sounds so good. but mine is like dam faster than his. thanks for you help guys.