Rb20det Sounds Like A Wrx. Runs Like Shit

[Mohsen]

hey guys

i reset my ecu to try and suss out my bad fuel economy problem yesterday

went for a spin and car ran beautifully. this morning it sounds like a wrx and drives like ass. really hesitant etc

could it be the coils or plugs?

[scotty014]

hey guys

i reset my ecu to try and suss out my bad fuel economy problem yesterday

went for a spin and car ran beautifully. this morning it sounds like a wrx and drives like ass. really hesitant etc

could it be the coils or plugs?

probably coils mate, but check the easier things first like plugs etc.

[mad082]

+1 for coils or plugs, or possibly the ignitor

[Mohsen]

thanks boys, will do when its not as hot

[Passage GT]

If you have a spare ignitor try and swap that in. I had a problem with mine for ages until i just got another one. Stopped missing straight away!

[Mohsen]

okay coils are out

dont have the long tool to get the plugs out though

second noob q- how do i tell if my coils are dead?

[GTR-N1]

okay coils are out

dont have the long tool to get the plugs out though

second noob q- how do i tell if my coils are dead?

Look very carefully around the sides of the coils to see if there are any scorch marks or pit holes.

If a couple are like that, it's better to replace the whole set.

You might get a temporary repair or test, by applying a coat of silicone sealant around the outside and wrapping it with electrical (insulation) tape.

[Mohsen]

alright,i put it all back together and started it. again "brabrabrabrabrabra" but i also noticed a hissing sound

followed it and found out theres a small hole on the plastic hose joint where the throttle body meets the intake pipe

could this be it?>

none of the plugs looked scorched or anything btw

Edited October 23, 2010 by Mohsen

[Taleb Tyres]

i was having similar problem, turned out to be my plugs had shit themselves at the tips leavin a huge gap causin the "wrx" sound haha.

[Birds]

Sounds like it's not running on 6 cylinders. Coilpacks are actually the easiest for initial diagnosis. Use the following logic to determine which one is problematic...

Have the engine running, one by one pull out each coil pack wiring loom plug...if a cylinder is working it will make the car struggle even more when you pull it's coil pack plug off. If a cylinder is dud then it will make no difference. Once you locate the dud cylinder/s, switch off the engine and switch the coilpacks between a healthy cylinder and a dud...start the engine again and start pulling coilpacks again. If the previously healthy cylinder is now a dud then it was obviously a faulty coilpack, but if dud cylinder is in the same place then you can rule out coilpacks and start looking at plugs, wiring loom, or fuel supply for that particular cylinder.

[tomtom92]

alright,i put it all back together and started it. again "brabrabrabrabrabra" but i also noticed a hissing sound

followed it and found out theres a small hole on the plastic hose joint where the throttle body meets the intake pipe

could this be it?>

none of the plugs looked scorched or anything btw

yeah this could definitely be the problem. any leaks in the intercooler will cause it to run terrible.

[Mohsen]

yeah the hissing sound was what made me check all the piping and surprise, i find a small split in a joint.

[Mohsen]

replaced the joint. same shit

i think ill buy a set of splitfires and plugs..

stocker coils are 20 years old bla bla

[GTR-N1]

stocker coils are 20 years old bla bla

Are the wiring looms stiff/hard/brittle?

[mikmac_farmer]

Are the wiring looms stiff/hard/brittle?

i had the same problem with my 32 after my mechanic degreased the motor 2 days later it was like driving a wrx just went through the elimination process with which cylinder it was and found it was a fried coil which i had a spare set anyways

[Mohsen]

yes terry, they are brittle.

looks like i ran out of time today.

i guess ill start doing the process of elimination tomorrow and see how i go

[mad082]

if there was a split in the pipe then the car would've been running rich. your spark plugs are probably fouled. try a new set of plugs first, but i'm guessing the coils will still be shot though.

[Mohsen]

yep, gona grab some ngk bkr7e's after work and see how i go. also tape up the coils while im at it until i can get splitfires

[bozodos]

use bcpr6es, longer and a hotter heat range

[mad082]

yeah as boz said, go the 6's with the taller top. will make slightly better contact with the coil and being a hotter plug will be less prone to fouling. you aren't running enough boost to bother about 7's.