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RB20DET Engine miss

Roy

By Roy,
in Engines & Forced Induction

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Roy Grand Master

Roy

Posted
Posted

My car has just started to miss badly, sounds a bit like a WRX and seems to be only running on 5 cylinders.

Car seem to run fine when cold, but after about 15min of driving the miss returns.

As soo as i stopped the car i ripped out the coil packs and checked the risistances. When hot/warm cylinder 3 was giving strange readings, whilst the other 5 cylinders all read 1.3ohm.

Now that all 6 coil packs are cold they are all reading the same resistance????

So how and where much for a full set of new coil packs, whats the go with 2nd hand, someone lend me a spare RB20DET coil pack so i can ensure thats the prob before shelling out money!

Thanks

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TRUSTGTR Apprentice

TRUSTGTR

Posted
Posted
My car has just started to miss badly, sounds a bit like a WRX and seems to be only running on 5 cylinders.

Car seem to run fine when cold, but after about 15min of driving the miss returns.

As soo as i stopped the car i ripped out the coil packs and checked the risistances. When hot/warm cylinder 3 was giving strange readings, whilst the other 5 cylinders all read 1.3ohm.

Now that all 6 coil packs are cold they are all reading the same resistance????

So how and where much for a full set of new coil packs, whats the go with 2nd hand, someone lend me a spare RB20DET coil pack so i can ensure thats the prob before shelling out money!

Thanks

time to contact Doughboy :)

Roy Grand Master

Roy

Posted
  • Author
Posted
time to contact Doughboy  :)

"oh where are thou Doughboy"... :Oops: Are RB20/25/26 could packs interchangeable????

Cant complain, this is the first problem the car has given me in 4 years, save the speedo cable and alternator :)

Also compression test would be nice.

No way, what i dont know cant hurt me... :) Got to get the car ready to drive down to Melb on the weekend, so if i cant get this sorted may be better of flying down :)

B-Man Grand Master

B-Man

Posted
Posted

Roy, Did I ever tell you the story about how my car sounded like a WRX ??? Ended up needing a new engine.......

I hope it is not the same problem.

BTW - I think they are the same in all RB series see here for Splitfire replacements:

http://xspeed.dreamhost.com/catalog/produc...products_id=446

Roy Grand Master

Roy

Posted
  • Author
Posted

B-man, if it was every time i turned the key id be worried, but it comes and goes, and always runs fine when car is cold...only happens sometimes when the car has been running around for 15 minutes.

I might just fly down, its cheaper option anyway. Leave the car for 3 months and it may foix itself.

sweetr33 Experienced

sweetr33

Posted
Posted

well obviously when the engine has been running for that 15mins or so the engine bay temps are quite high, coil packs do have a failure sympton of which they will deteriorate when hot, and work fine when cold. Relatively speaking this mayb the problem. I think if u are suspect of a coil then get a Coil off a mates car put it on and run the car, see if it is now gone. Easy way to rule out the coil pack in doubt

Roy Grand Master

Roy

Posted
  • Author
Posted

Im thinkin git is most likely a coil pack, but what is to go with replacing them. Being pedantic im tempted to replace them all, but what isa set worth?

And could be the injectors, as they were installed about 2 days before the problem started, though they had been cleaned, flow tested and spray patterns checked...its posssible the guy that did it wiped them down, put new pintle caps on them and charged me???? But the running fine/bad...hot/cold thing has me thinking coil pack.

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