Author Topic: Engine pinging after DASC installation... (Read 8663 times)

HaNasich · « **on:** March 13, 2009, 10:23:08 AM »

my dearest and nearest got DASC in the last three weeks.

today i first drove it and i noticed the following:
1. when engine is cool / hasn't reached working temp everything is awesome.
2. when engine is at normal working temp - it pings when i accelerate.

when this happens i depress gas pedal a little and it stops. from certain RPM it doen not happen.

any ideas what should i check?

thanks

Ron.

rob_e30 · « **Reply #1 on:** March 13, 2009, 02:05:35 PM »

What octane fuel are you running? Have you done anything to the ECU to help it address the boost? I'm not sure if these kits come with a chip or an ignition retard device but it sounds like you have too much timing at operating temp.

If you can get some 100 octane gas, run it and see if that helps solve the problem.

bearsbmw · « **Reply #2 on:** March 13, 2009, 02:20:39 PM »

what spark plug's are you running? check your fuel pressure while under boost and get a boost gauge..is the crank pully stock?.. from the looks of where you sucking air from it's going to be prity damn hot .... no air filter?

Looks like your PCV is connected to your ICV ... doesnt look right to me

ludiagsm · « **Reply #3 on:** March 13, 2009, 02:23:45 PM »

Quote from: rob_e30;68240

What octane fuel are you running? Have you done anything to the ECU to help it address the boost? I'm not sure if these kits come with a chip or an ignition retard device but it sounds like you have too much timing at operating temp.

If you can get some 100 octane gas, run it and see if that helps solve the problem.

+1

nuvolarossa · « **Reply #4 on:** March 13, 2009, 02:31:43 PM »

the kit runs only with the RRFPR (rising rate fuel pressure regulator), so stock ecu timing.
This is a band aid solution and at least check that it's giving the right pressure, to obtain a good air fuel ratio under boost!

so you need a fuel pressure gauge or better a wideband o2 sensor with gauge, to see the air/fuel ratio under boost.

A lot of DASC use only the RRFPR and pinging is not normal.
- Are you sure that you are running the right pulley, as I see that you converted it to v-belts pulleys... if you are running more boost than RRFPR stock setting it will run lean and it will ping..

HaNasich · « **Reply #5 on:** March 13, 2009, 05:33:15 PM »

ok. some answers:
1. the pictures was taken during installation. i will post updated pictures later on, the looks now is all corrected.
2. the PCV and ICV both connect to the same input in the intake manifold, this is the way DASC manual is instructing and it works ok as the engine idle correct
3. the engine in the car is an E36 1995, you can see the thread about the swap here
so it has a serpentine belt from stock - meaning that all pulleys are stock as well.
4. i am using the recommended spark plugs for E36 M42 engine from Bosch, they are a year old and has about 6K miles of running time
5. gas im using is 95 octane. i have about a half a tank left, should i try adding methanol to boost up the octane?

now for some more questions -
how can i test fuel pressure? (i have compressions test kit, can that help?)
is there any way to tell weather the RRFPR is working ok?

Ron.

Boosted E30 · « **Reply #6 on:** March 13, 2009, 05:33:31 PM »

Quote from: bearsbmw;68242

what spark plug's are you running? check your fuel pressure while under boost and get a boost gauge..is the crank pully stock?.. from the looks of where you sucking air from it's going to be prity damn hot .... no air filter?

Looks like your PCV is connected to your ICV ... doesnt look right to me

+1 definatly you have some hoses hooked up wrong you cant run your crank case breather through your idle valve.

HaNasich · « **Reply #7 on:** March 13, 2009, 06:04:48 PM »

Quote from: Boosted E30;68259

+1 definatly you have some hoses hooked up wrong you cant run your crank case breather through your idle valve.

please re-read my latest answer - the pics are "during work" not final.
current setup has all piping routed correct.

Ron.

bearsbmw · « **Reply #8 on:** March 13, 2009, 06:20:33 PM »

Ok I understand how the PCV is routed now ... I didnt see the T fitting at first ... you defently can't run stock m42 spark plugs with a supercharger or turbo setup... you need to go 1-2 deg colder plug or you will pre det for sure!~

Hodge · « **Reply #9 on:** March 13, 2009, 08:53:08 PM »

Also, you don't have knock sensors, so I bet your running a bit lean maybe?

I throw an 02/Knock Control code at extended idle periods because it runs a little rich.

I never hear pinging in my car and I just installed it 3 weeks ago as well.

Also, you really need to work that intake out better and need to get a filter on that AFM stat.

I have a pretty good suggestion to clean up the install a little bit, since I just went through this as well kind of:

1) Flip your Intake bellow around, and route the ICV and its connected hoses on top of the S/C. This is how Downing specifies to do it in the manual

2) Doing this will allow your AFM to sit better and not on top of the radiator.

3) Re-work the Crank case vent, PCV, and ICV locations. Refer to my pic below.

4) What is that spring-clip plug sitting on top of the intake bellow?

NOTE: AFM plug was NOT cut and spliced in these photos yet.

rob_e30 · « **Reply #10 on:** March 14, 2009, 07:51:35 AM »

The only way to measure fuel pressure is with a fuel pressure gauge. You can get one used for testing and tape it to the windshield. You will see the fuel pressure rise and fall with boost.

You might try this plug... it's two rangers cooler than stock:
Iridium IX BKR 8 EIX #2668

Boosted E30 · « **Reply #11 on:** March 14, 2009, 10:35:19 AM »

Quote from: HaNasich;68261

please re-read my latest answer - the pics are "during work" not final.
current setup has all piping routed correct.

Ron.

sorry you must have posted right before me.

HaNasich · « **Reply #12 on:** March 15, 2009, 01:58:00 AM »

since i could not find any NGK in the shops near me i went for the other option and filled my tank with 98 octane fuel.
the car did go better and pinging is now only in a narrow range of RPM in 4th and 5th gear.
still i do not like it and i will go and get the NGK spark plugs today.

i do have some questions though:
there is this plug - NGK BKR7E which is 2$ everywhere i look.
there's this NGK's BKR7EIX-11 which is supposed to be the same but from irridium

Boosted E30 is talking about going two steps cooler to the ridium IX BKR 8 EIX #2668

which is the best one?

Ron.

rob_e30 · « **Reply #13 on:** March 15, 2009, 08:31:24 AM »

The BKR6E is the stock plug according to the NGK website. A BKR8 would be two steps cooler. The -11 is the gap.
Check out their guide here...

http://www.ngksparkplugs.com/docs/tech/partnumberkey.pdf

You can also look at their website to get info on Iridium versus their other plugs.

HaNasich · « **Reply #14 on:** March 15, 2009, 08:52:23 AM »

is there any gap recommendations for those spark plugs? should i leave them stock?