intermitant check injection light

[denzilpc]

hope someone can shed some light on this! car is 2005 1.6 cc the check injection and service light comes on at intermitant intervals but only after i have driven for some time then stoped and turned off engine, on restart the lights come on and the engine misfires , i have changed coil packs and plugs as surgested in previous posts now im calling on you for HELP

[MicKPM]

From experience, it's either a coil or injector, but as you've already changed coils it can't be them again (right?). Were the coils brand new?

Mick

[denzilpc]

yes new coils used oh well looks like the money pit has opened yet again

[MicKPM]

STOP!!!!!!

All is not lost yet... here's a few things for you to have a crack at yourself before resorting to spending out for parts you may not actually need.

COIL PACKS: Checking process:

1 - Bonet open, Engine cover off, engine OFF, Ignition OFF
2 - Find coil packs (x4) and remove retaining bolts (x4)
3 - Start engine and allow vehicle to idle/missfire/sound like crud
4 - With engine running gently lift Ignition coil #1 from cylinder #1 [SEE Q1]

> Q1 - Does the engine "stall" or does the idle "Condition" begin to fail/worsen?
>>> A - "YES" - Ignition coil okay... Replace the coil and repeat test for next ignition coil
>>> A - "NO" - Ignition coil possibly faulty... See Q2 below

> Q2 - Can you hear a definative electrical "arching" occur from the coil (Identified as a fast "Ticking" or "Clicking" noise)?
>>> A - "YES" - Ignition coil working... Check injector on this cylinder
>>> A - "NO" - Ignition coil faulty... Replace

NOTE:
Do not EVER disconnect and reconnect the ignition coil multiplug(s) whilst the engine is running as it can, in extreme cases, back feed the ECM/ECU and damage the ignition coil drivers!!!!

If all four igniton coils alter the idle condition then it is wise to have the vehicle correctly diagnosed with a live data mapping session to ensure CTS, H02-1/2, MAP, Etc are all within expected ranges. If all is good here then a compression test and finally physical check of the engines "timing" will be required.

Mick