Timing Problems

[Mcdity]

Hi, just recently I have heard a "flat spot" or slight internl backfiring (pop). This only happens when I start to accelerate quickly when idling. I checked my timing and it is a little out, about 20 btdc! I have not "jumped" E1 & TE1 and my system has no distributor. How can I adjust the timing to about 10-12btdc or am I just going to have to leave it as it is?

Cheers

McD :shrug:

 

[BTO]

Has it thrown any codes?

 

[Mcdity]

Not that I know of save that when I plugged in my OBD it said that no 2 was misfiring. I removed the coil and swapped it around but still the problem remains the same but nothing on the OBD after that.

 

[mattman]

you checked that #2 plug also, right?

 

[YotaZach85]

When was the last timing belt service done? There is no adjustment on the ingition timing, only valve timing so it sounds like you may have jumped a tooth or two on the T-belt.

 

[Mcdity]

Matt, just changed them out yesterday.

Yota, thanks I will have this checked out.

Cheers

McD

 

[TheDurk]

Is it stuck at 20°BTDC? The spec is 3°-19° BTDC and what you should see is the mark moving in a range between 3° and 19°. (at idle and trans in neutral). You will never get it to stick at 8°-12° nor would you want to.

Is idle speed at spec? 750±50?

I'd definitely check for vacuum leaks and chase that misfire. The ECU is in charge of ignition timing, and it's off for a reason. Timing Belt slip would surprise me. Sensors (crank position?) possibly.

 

[Mcdity]

Thanks Durk. Yes rpm is at 750-700 but at about 900 when the ac is on. I will check for vacuum leaks again today and let you know what I find.

Cheers

McD

 

[Mcdity]

Durk, I checked all the vacuum hoses but they are all tight and connected properly according to the diagram. Still have the small misfire.

Cheers

McD