1998-d16y7-turbo-flooding/nostart issue.

[West Dylan]

Mostly I just lurk these forums, but I'm running into an issue now a days and would like the input of other Honda enthusiasts on here.

Recently I put my car back together after having it basically stripped through the winter (lots of things were changed so there is lots of room for my error, unfortunately).
The new parts (or at least new to me in some cases) installed on the vehicle were:
-z6 intake manifold
-440cc high impedance injectors/255lph pump from xenocron
-aem high flow fuel rail
-B18B1 stock FPR
-Y8 throttle body
-Felpro headgasket installed (my timing belt was marked in several spots, all went back together the exact same way, I didn't line it up at true tdc and check the marks on the covers and block but I wouldn't think it could change if the belts still in the same spot, I will be checking this further when I am not working, though)
-OBDI conversion with a chipped p75 ecu from Xenocron w/ their basemap for my specific supporting mods.

I've checked spark, it seems fine, made sure of my injector order and ignition firing order (they are good, but I am going to check for a stuck injector after work as well)
My compression is coming back as 160psi on all 4 cylinders.

The car will generally just crank and attempt to start, almost start then putter out. When it does run though, it's very poor on idle, or it will just bog out basically right away. It basically sounded like a 302 with a cam at idle.
My IACV seems like it's working, but I haven't searched for an in-depth way to check this yet (I will probably also check this after work).


If anybody on here has a suggestion for somewhere to look or something to double and triple check, I will take any of the advice I can get; also if I'm lacking any information feel free to ask, I'm sure there's probably something I overlooked while re-reading the thread.

Thanks,
West D.

 

[West Dylan]

When it's running it's very rich, extreme scents of gas. I'm more so assuming, rather than a having a solid fact. After attempting to start it and it not wanting to start, I have unplugged my injectors and it will run somewhat normal for a period off of the gasoline that's left in the cylinders. Maybe I'm wrong but wouldn't that mean it's getting fuel, possibly too much? -- But yes besides the rough idle it seems to rev normally, though I haven't kept it running for long.

I'm not very familiar with the tuning aspect of this, I wanted to bring it to specialist in my area to get it dyno tuned. I believe xenocron uses a chip tuned on crome w/ a basemap that should run the 440cc injectors. Hopefully that may help you a little.


Thanks for you time,
West D.

 

[West Dylan]

As far as I'm aware, I cannot actually read the information on this chip. I've given Xenocron my information, the engine, and engine code, turbo size, injectors, the fact I have a swapped intake manifold, the fact I have a stock MAP sensor, etc. I am under the assumption they would do it accordingly to that provided information.

So if my understanding of how you want me to answer this question is correct; the basemap should be for a 'stock' d16y7 with the supporting modifications I provided for them.

Worst case scenario, I can have it towed up to my local tuner and have him figure out where the problem is for me.

Thanks.

 

[West Dylan]

If you have completed all mods to the engine, then it's time to have the set up tuned by a reputable tuner. Good luck.

Really appreciate you're input, thank you for responding!

 

[XpL0d3r]

The basemap should still allow the car to run and limp around. The point of the basemap really is just to be able to get the car to the tuner without blowing it up on the way there.

The fact that it has trouble even starting leads me to believe that there are other issues as well.

I didn't line it up at true tdc and check the marks on the covers and block but I wouldn't think it could change if the belts still in the same spot,

This is where I would start. Check that your timing is good.

You should also check for CEL codes. Since it's ODB1, you'll need to jump the P2 service connector under the dash where the ECU is. It should be a blue 2 pin connector. Jump that and turn the car ON-II (don't start the engine). If the CEL starts blinking, ECU is reporting a code. If it remains lit, no codes are thrown. Depending on the base map tune, the CEL may be turned off entirely.

P75 ECU should be OK to use since it's chipped. Since you let Xenocron know the engine details and all that, I would assume it's fine. You may want to reach out to Chris @ Xenocron for help -- he's pretty good at solving these types of issues.

Really your best bet though is to get the car to the tuner and let them take care of it. You might spend a bit more, but they'll diagnose it and make sure everything is snug and will tune it properly.

 

[West Dylan]

The basemap should still allow the car to run and limp around. The point of the basemap really is just to be able to get the car to the tuner without blowing it up on the way there.

The fact that it has trouble even starting leads me to believe that there are other issues as well.



This is where I would start. Check that your timing is good.
.

Precisely, also makes me think I'm over looking things somewhere, I will definitely be going to double check the timing via my work's book procedure once I'm off the clock.
Will also more than likely quadruple check everything else again to make sure I didn't go wrong anywhere else along the line. If it all seems to check out again with the help of another set of eyes, I'm definitely going to bring it to my local tuner.

Thanks for the input, Xplod3r. Appreciate it.

West D.

 

[West Dylan]

Turbo is on the vehicle, the charge piping is disconnected at the throttle body at this point in time, though.

Yeah, I definitely should have consulted somebody prior to this, but I'm young and a little stubborn, and like to try and learn as much as possible myself. I will definitely learn from this experience, and a project like this would not be done the same way that I've done it now.

Will be checking for any CEL's after work, and there shouldn't be harm in me rechecking all aspects across the board. If I can't come to any conclusion within the next day or so, I will probably be paying someone more knowledgeable than I to have a peek!

 

[West Dylan]

This is necessary rather than an option because the engine and ECU must be customly tuned to run together properly.

Sorry for the wording there, more-so meant for this specific issue, but regardless, yes I'm aware it will need to be tuned. That's exactly where I'm trying to get it in case that wasn't very clear. But maybe on a flatbed instead of driving.. Hahah.

I know it's probably a nuisance on these sites to deal with someone a little less skilled, so thank you for taking time out of your day to answer me

 

[XpL0d3r]

Do you have a wideband o2 sensor gauge hooked up? If not I would look into getting one. It's the most important gauge you can have for a boosted car. Will help with diagnosing rich/lean conditions along with other things.

All 'issues" mentioned so far may be solved with a proper tune. The sooner you get to the tuner, the better off you'll be in the long run, as long as you have rigorously verified that the tuner is worthy of your business. The latter is where you should be spending your time now.

Assuming he has the correct basemap, the car should at least still start and idle. If he can't get this far, it sounds like there's other underlying issues. If he doesn't have the correct basemap, well that's a totally different story lol

 

[West Dylan]

@boofoo As far as I'm aware they've got a great reputation in my area. I believe they're the only place anywhere near my city that even does this sort of work as well.

Again, thank you @XpL0d3r , I have a wideband it actually just arrived recently, if I have enough time I will install it to verify anything I can.

 

[XpL0d3r]

Example: If he has the "correct basemap" but the engine is configured differently than the basemap,

Well this would just mean that he doesn't have the correct basemap. When they come from Xenocron, Phearable, wherever, they will ask you information about your engine. They'll ask about the year /model of the car, motor specs, map sensor, injector size, etc. Based on the info provided to them is how the basemap is created.

I hate to assume but... assuming OP has provided the correct specs to Xenocron, and assuming Xenocron has created the "correct basemap" based on those specs provided, the car should at least start.

 

[West Dylan]

It's definitely going to a tuner, within the week or so, whenever I have a moment to call and speak to them.. I just like to have second opinions, never hurts to talk to people. Everything's been double checked with Xenocron I've contacted them once, the basemap 'should' be fine.

If we're going to 'assume' anything we should assume I more than likely I made a mistake somewhere along the line, but we're only human, people make mistakes. Like I said before, I like to try and learn stuff, it's just a hobby, no big deal.

Thanks for the input, once more. You've both been very helpful!

@boofoo @XpL0d3r

 

[XpL0d3r]

For sure, keep us posted!