car falls on face at full boost?

[black240jl]

, ok my car runs fine, i can boost til 10 and its fine but if i let it boost to 11-12,that being the max boost it sounds like its farting and doesnt have any power, what could that be????, at idle the fuel pressure is 45psi,, i can let off the gas a lil bit and its fine but when its wot at full boost its horrible idk what it could be? please help me my number is

618 559 4276 if you wanna give me a call and help me real fast thanks

[Darius]

Pressure test for a boost leak at 10psi or whenever you see problems.

[black240jl]

i see the problem at 11-12 psi, not even at wto doesnmt matter jsut when it hits full boost..

[REDLN]

you might be blowing spark bud. regap the plugs closer together and see how it fill when you hit wot. cousin's supra did that when it started to build more then 9 pounds.

[DriftX]

You need spark, air, fuel, timing and compression for a motor to run.

It's getting air, compression and timing are there.

Now check your plugs and gap, that will tell you alot. Clean and reinstall. Inspect your coilpacks for any deterioration or bleeding. If found cover the boot in lithium grease to help insulate it. Check all coilpack connections. Tighten connections on ignitior.

As for fuel, fuel pressure is fine, tad high.. but not enough to make it run like ***.. make sure injectors clips are tight and timing is spot on.

[black240jl]

i have brand new ngkR plugs, put em in about 3 days ago thats when it started doing it, i will gap em to about .28 and see how it is, should i get better plugs or?

[BoostFab]

.28 is too wide. did you meant 0.028" ???

get a set of NGK 3330 (BCPR7ES) plugs and check gap to 0.8mm or 0.0315-inch. I recommend these plugs, very successful on 700+ hp cars and held up great.

[black240jl]

yeah i guess so, i have brand new ngk R plugs in there now jsut gonna gap em and see if it fixes the problem...i hope so

[Shocker]

yeah i guess so, i have brand new ngk R plugs in there now jsut gonna gap em and see if it fixes the problem...i hope so

you guess so? are you trying to fix the problem or make it worse?! .24 thats HUGE.

.8mm works out to be .031", gap to that and go from there.

[Carl H]

on midly modded cars i reccomend bcpr6es-11's...7's are too cold for a stockish motor.

[rb25drag]

I ran those 11's and had no luck Carl! Mine kept detonating @ 10lbs of boost @ 4000rpm's , I switched to the much colder Acdelco 6's and problem solved??

I notice mine doesn't like 93 octain either. Seems sluggish, I put the 112 race gas in and its smooth as ice!! But thats up to 8$ a gallon so Rb's been setting for a while!

[Shocker]

I ran those 11's and had no luck Carl! Mine kept detonating @ 10lbs of boost @ 4000rpm's , I switched to the much colder Acdelco 6's and problem solved??

I notice mine doesn't like 93 octain either. Seems sluggish, I put the 112 race gas in and its smooth as ice!! But thats up to 8$ a gallon so Rb's been setting for a while!

Sounds like you need to reset/check your base timing.

[rb25drag]

Sounds like you need to reset/check your base timing.

I have, its set at 15 degree's, I backed it off to 5 defree's trying to get it not to detonate but it didn't help, Plus at 5 degree's it wouldn't Idle without loading up with fuel.

[Shocker]

I have, its set at 15 degree's, I backed it off to 5 defree's trying to get it not to detonate but it didn't help, Plus at 5 degree's it wouldn't Idle without loading up with fuel.

stock turbo? ecu?

[rb25drag]

yup & yup

[Shocker]

yup & yup

FPR at 43psi with vac, and holds after full boost is reached?

[rb25drag]

I have messed with the FPR a few times, It runs better anything above 45PSI VAC on, But too high and it won't idle, I think my current setting is 50, But Im not sure if its holding under full boost, I have no way of checking as my gauge is under the hood, Unless I throw one of my buddies out there for a ride of his life

it's trying to run lean sometimes under full boost 10-11PSI 12-13 AFR which varies, So I have it set to 9PSI @ 12.1 AFR for safety, but im not too worried about it all, Im trashing all the fuel equipment, When i go to propane none of that stuff is going to be needed, And tuning is going to be easy!

[s13_240_rb20]

Im trashing all the fuel equipment, When i go to propane none of that stuff is going to be needed, And tuning is going to be easy!

got a pump you want to go to a good cause?? lol (but seriously??)

--TJ

you guess so? are you trying to fix the problem or make it worse?! .24 thats HUGE.

.8mm works out to be .031", gap to that and go from there.

so what would happen if someone happened to set their gap to .08 INCHES?? what would the car do if there is too much gap? any affect on fuel pressure? lol (feeling kinda stupid right now...)

--TJ

[rb25drag]

I will have a good pump forsale, But its going to be another month or 2 im still running it and don't have the cash for my propane setup yet.

Also Im running the Walbro 255, I have been reading some horror stories about them with guys running alot of power, SO if your planning on running alot of power might wanna look at an alternative!

As for the spark if you have too wide of a gap you going to blow the spark out with little boost, If your running alot of boost then you should have a smaller spark gap as stated earlier.

Its like Blowing the flame out of a lighter, The harder you blow the quicker it blows out.

[s13_240_rb20]

I'm running stock boost, a Bosch fuel pump (which may be going out...please look at the videos in my "only starts with starting fluid problem" thread and give your opinion?), and my spark plugs are wayyyy too wide I think...lol

That might explain the "only starts with starting fluid problem" lmmfao.....oops..

--TJ

[rb25drag]

I looked at your video's, Posted my opinion.

Check you Gap Even if its too wide it should Idle, Shouldn't have anything to do with the starting issue.

[BoostFab]

I ran those 11's and had no luck Carl! Mine kept detonating @ 10lbs of boost @ 4000rpm's , I switched to the much colder Acdelco 6's and problem solved??

I notice mine doesn't like 93 octain either. Seems sluggish, I put the 112 race gas in and its smooth as ice!! But thats up to 8$ a gallon so Rb's been setting for a while!

cut the crap and get the NGK 3330 (BCPR7ES) it helps prevents detonation a little bit on bad gas mixture. i don't care what others saying about it.

i have brand new ngkR plugs, put em in about 3 days ago thats when it started doing it, i will gap em to about .28 and see how it is, should i get better plugs or?

there's no what if, gap that thing correctly or go home.

[black240jl]

it was the plugs, thanks

[s13_240_rb20]

it was the plugs, thanks

so, it runs better with the plugs gapped better, gotcha on that. but wondering, did your car run lean when it hit that wot point? did you ever test it?

--TJ

[shally2186]

i have a RB20 with little mods running on the bcpr6es-11's..runs great!! i had detonation problems in past but it just ended up being my fuel pressure..im on 40psi @ idle and the car is runnin better than ever

[s13_240_rb20]

i have a RB20 with little mods running on the bcpr6es-11's..runs great!! i had detonation problems in past but it just ended up being my fuel pressure..im on 40psi @ idle and the car is runnin better than ever

I am running the bcpr6es but I never understood what the "-11" meant. But I am gonna regap them to the correct setting of .031 inches and I am waiting on my vac/boost gauge and another new walbro pump, this time to replace my bosch 040 (a downgrade) that is probably gone out. Builds pressure, but fuel flow is weeeeaaaaakkkk...

--TJ

[black240jl]

putnew plugs in, ran like **** turned fuel psi down it was running lean i regapped the old plugs, same thnig and turned the fuel psi to about 43 at idle runs fine a little rich but until i tune it perfect it will run a bit rich

[rb25drag]

What plugs did you go with?

[shally2186]

bcpr6es-11's were not the right plug for me..my iridiums worked fine and i just replaced them w the bcpr6es-11's which lasted for like an hour...NGK BKR6EIX were the plugs i used to have and now i think ill put in NGK BKR5EIX..

[rb25drag]

Your spending ALOT of money on those NGK's for nothing, I have never had my motor run right with them. I switched to AcDelco #4's, Runs like a champ. I think im the only one on here that has tried these plugs! Plus there only like 3$ a plug. 1/4 price of the NGK's, Give these a try and you should have good results as I did.