track car beepen about

spudep91 · Post by **spudep91** » Mon May 25, 2015 8:55 am

Hi lads!! Haven't been on in ages but had are 4th gen 2.2 vtec out on track yesterday. Car done ok for first few sessions then as we were in pit line up it done like a missfire then went into like limp mode (coulded rev over 2rmp or so) was like a limiter.
Basically had to let it cool a way down and to ecu out and in and got an other 2 sessions out of it were it went ok. Then comen to last of session it stated to miss and hesate up in vtec land. Kept it going for few more laps then got really bad and missed all the time. Then came into pits and it went back into limp mode again. After that done ecu thing again and it came out of limp mode again but was still missing like mad and no vtec then sometimes you got a bit of vtec. Any ideas lads?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon May 25, 2015 9:13 am

If it went into limp mode, it will have stroed a fault code to tell you what is wrong. Provided you haven't unplugged the ECU/disconnected the battery since the last time it brought up the CEL, that fault code will still be in there.

Pull the code and it will help diagnose what the problem is.

If you've reset the ECU since the last time it had the CEL, then we'll be blindly fumbling around in the dark and this will be a nightmare to diagnose... In which case, I would start with HT leads/coil/distributor fault (something breaking down in the heat). But really, without the code to start with on an intermittent fault you'll end up changing bits inconclusively without knowing if you've solved it.

spudep91 · Post by **spudep91** » Mon May 25, 2015 9:52 am

Yea wete reset it again. Ill take it out again and try to get it to go into limp mode again then. At minute its just missing like made all over the rev rang. So to pull the code use paper clip and read the dash?

Post by **Merlin** » Mon May 25, 2015 10:14 am

Yeah pull the codes and see what it says. Chances are that it will say misfire on cylinder XX. As Wurly says hopefully it is just plugs/leads etc..

spudep91 · Post by **spudep91** » Mon May 25, 2015 11:19 am

Think ill get new plugs and leads anyway. We're best place to get them. Its a cert we can't get it to go back into limp mode now as haven't anywhere to race round lol

spudep91 · Post by **spudep91** » Sat Mar 26, 2016 4:11 am

Yeaaaaaaaah after all this time I got her singing again.
After going through many dizzys leads and different plugs also changing ecu and striping engine to check the timing hadn't slipped. We got to bottom of it. Was faulty injector or injectors as put 4 other injectors in with the rail and she's finnaly singing a sweet tune and tf. Can't wait to next track day. I had lost hope in her to lol.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Mar 26, 2016 10:55 am

Well done tracking it down.

If it was a problem with the injectors, it would be worth checking/changing the fuel filter...

spudep91 · Post by **spudep91** » Sat Mar 26, 2016 11:41 am

Cheers pal. I assume 5 gen filters are same as 4gen. As when I go to motor factors I use my m8s 5gen reg as I can't remember my own reg on the 4gen as lost log book and there are no plates on it lol

spudep91 · Post by **spudep91** » Sat Mar 26, 2016 6:43 pm

Also done a compression test on the car and was 220 on all 4 pots witch was happy with