Dear Forum,

Been right through Fuel/Injectors/replacement etc searches and have found nothing. Please could some one recommend which brand of replacement fuel injectors I should be looking at?

I thank you in advance for your kind assistance.

 

I have found both Standard Motor Products and Beck/Arnley parts to be of good quality.

 

Thanks Dan R, I'll order Standard from RockAuto (there is no point me sending back my cores from Dubai)!

 

Sure injector cleaner will not clean them?
Have seen it help out B4

 

Yes, it does (I think). I have new plug boss seals, new Cam Cover gaskets, no oil in plug wells, all new plugs & coils (all OEM) and I have conducted all of the ignition circuit pin point tests and all have passed. However, I still have an ongoing but intermittent misfire code on number 2 (P0302 + P1314). It appears out of nowhere, I put Injector cleaner into my tank, the codes go away for a while and then come back! I am reluctant to keep putting cleaner in my tank because I am unsure of whether excessive use is advisable?
I am going to try swopping injectors on numbers 2 & 4, to see if the code moves....If it does, then I will either attempt to find somewhere here that will clean injectors properly without my need for a mortgage, or replace the offending injector?

 

It could be the ignition coil. Swap those too.

 

Thanks Dan R but that and swapping plugs was the first thing I tried, even though they were OEM new just 6 months ago!

 

Could very well be a fuel issue, causing your misfires.

 

Thank you for your post, Wingrider; I am certainly at a loss to see what else it could be?
However, before I start messing about (in my inexpert way) with Injectors, I am going to try a dose of BG44 in my tank - I read a rave review for this product (somewhere) on this excellent forum - My apologies for losing track with the reviewers name, (whomsoever you are), given the many posts I read, but thank you anyway!
Is it not good to know that somewhere, there is a person over 60 years old, who still believes in magic?

 

Today I have P0302 & P1316. If the problem was with the Injector circuit, wouldn't I also get another DTC - Say, P0202?
If so, the fact that I do not have this DTC still leaves a clogged injector as the likely culprit, wouldn't you think?

 

Sorry I must have missed it but why is it not the coil as usual?

 

Hello JagV8, thanks for posting.
I have new plug boss seals, new Cam Cover gaskets, no oil in plug wells, all new plugs & coils (all OEM) and I have conducted all of the ignition circuit pin point tests and all have passed. However, I still have an ongoing but intermittent misfire code on number 2. I have tried swopping coils and plugs but the DTC's stay at number 2.(P0302,P1314 and occasionally P1316)

 

No DTC's today, but I notice that 'Components' failed to pass its test (please see below)?

All Sensors 10.09.18

 

Oh, I'd rather it was a coil... maybe do a compression / leak-down test next.

 

I had a compression test done back in February; 5 cylinders at 148 and three at 135. No loss of power, got no smoke and not burning any oil at all? Thanks for the suggestion, but I am going to try switching injectors around before I revisit compression.

 

JagV8, how about a Cylinder Head Gasket? I have a little emulsion in my Coolant? Perhaps a very slight leak near cylinder 2 could be causing low compression just in cylinder 2 without loss of oil or power? What do you think? Am I miles off?

 

I think you would see a difference in the spark plug's condition if it was being affected by a head gasket leak and causing a misfire. I don't think a small head gasket leak would result in the misfire described. It would be more persistent and the loss of coolant or coolant in the oil would be fairly significant. If it is not the injector, I might think the actual wiring to the injector or coil may be damaged resulting in an occasional "short" that could manifest as a misfire. I think the plan on looking at the injectors as described is well thought out. I also believe you have ruled out the coils and spark plugs. I seem to recall (I think it was you anyway) that you have a bad electrical connector once before. Age and heat can be very hard on wiring and connectors.

 

You are perfectly correct; impressive memory - It was quite a while ago when I found a broken wire in my EGR valve connector!
Like you, I believe I have ruled out coils/plugs. I also think/hope I have dismissed coil wiring (all pinpoint tests passed). However, as you say, that could still leave coil wiring...…..
Accordingly, if the DTC moves with the injector, then it is the injector and if it stays with the swopped injector at number 2, then it must very likely be the injector wiring. Having said that, in this case, I would have expected an injector-circuit DTC to show up?

 

Hi EsRay,

Just to add to your thoughts.
The fuel trim readings you posted points to an injector issue. They would not be explained by a head gasket, nor a wiring fault to the injector, but would match a dribbling injector rather well.

Putting the injector in an ultrasonic bath should clean it properly, but if you don't have access to one then a new injector should sort your problem.
You've already ruled out the other possibilities very effectively.

Regards
Tesla

 

Thank you. I have been wondering for ages why my Bank 2 trims are double negative and out of kilter with Bank 1 - I have had this mental image of the injector on 2 pouring a glob of fuel into the cylinder instead of a fine spray and the oxygen sensor going Whooah!