Hey guys, a problem popped up in my Crx and Im hoping to get some help. Car was running mint, came completely out of the blue over night. The car has a d16a6 turbod with a chipped PM6 ecu running TurboEdit. But I dont believe it has anything to do with the chip or tune.

The problem is the car is INTERMITENTLY not starting, will crank and crank for 15+ seconds with nothing, then all of the sudden will give a puff and a few seconds later with the gas down it may kick over VERY reluctantly, and run like its missing (its lean) AFR gauge shows its lean. Car wants to die if you dont give it gas. I have a fuel pressure gauge mounted on the rail and it shows 43psi while idling horribly

If you do possibly manage to get it running long enough to get on the road, it runs good for 2 seconds, then goes lean (afr 16:1+ and bogging/backfiring) then good for 2 seconds..... then bad..... over and over.

At first I thought main relay, so I got 2 from the junkyard, resolderred to MINT and same thing with all of them. I dont think its the main relay.

Then before work the car started perfect, idled perfect with no gas assistance needed, got me all the way to work. Then after work same thing, had to crank for over a minute to get it to eventually huff and puff and start with LOTS of gas pedal. And it did the intermittant lean the whole way home.

I really am not sure where to go with the diagnosis. I am fairly positive its running think way because of fuel starvation, but I dont get why. The injectors are new, walbro 255 intank with over half a tank of fresh gas. Ran flawlessly last week.

I am leary of the B&M FPR I have installed, as it is dangerously close to my strut bar, and its vacuum line is pushed/kinked against it, but my fuel pressure gauge shows 40-46 while idling all funny, possibly thinking of changing that to an oem.

Could my IACV possibly have anything to do with this?

Open to all ideas and opinions. I need a safe ride to work!! Thanks guys

 

I really dont get when i try and start it, if it starts right up, it dies after running for about 2-3 seconds

Or it just wont fire up and crank and crank and crank

What would cause it to shut down after 3 seconds

 

How's the fuel filter?

 

Fuel filter is about 6k miles old, 6 months, just an off the shelf autozone brand

Just swapped in a new dist, same symtpoms. Also checked the resistance on the coil of the dist I pulled out and it was good @ .6ohms

I also thought to check the ecu for codes (obdO count the blinks) but my ecu red light is not flashing with the key on. Even though a week ago I know it was throwing a constant Code 1 since I dont have an 02 sensor.

I pulled the hazard fuse and am gonna burn a new ecu chip with the same map bin on it and see what happens

 

what fuel pump? could the sock have fallen off?

 

Very possible the sock could have fallen off, Im a drunk and do everything in the middle of the night lol

Possibly fixed, may be a fluke. I reset the ecu and burned a new chip and it started right up, doesnt start like it did a week ago, crisp and right over, its a little reluctant and weird sounding for half a second

But Ive tried 3 times now in the less 90 min and it started everytime

It was an Amtel chip I used last, I usually only use SST's I dont know where it came from

By lean I meant 17:1 and up

Im gonna swap the old dist back on if the car gets me back and forth from work in good running condition. Im thinking it had someething to do with the ecu/chip though

 

Yea I would think it is ecu related. If you have good pressure to the rail and injectors are new or newier i doubt they would be the problem. An IACV would be an issue when the car is warm, if you take the intake tube off you should be able to see two holes in the throttle body. Cover the top one with your finger which blocks off the iacv. If the idle straightens out then your iacv could have an issue. Being as it is hard to start sometime etc, i would lean to ecu. I am not super fimialr with the PM6's but do they still have that barimetric pressure sensor in them like the p28's? Maybe that isnt reading right and causing your car to have a hard time starting.