Running super super rich

Jacob5.0 · Apr 25, 2010

Hi all. i am new to the site, and i have looked through all the threads on running rich but none of them seemed to fit with my prob. i have newly built 302 .040 over, balanced crank, hyperpuleptic pistons, windsor sr. heads, x303 cam, 1.6 crane roller rockers, gt40 intake (ford explorer), 24# injectors, mass air conversion, and i am probably forgetting some stuff. i just built this engine myself and got it in and running but it is running so rich that it is fouling the plugs in like 10 min. i have been trying to figure this thing out and i am just getting nowhere and getting really pissed. what i have found out so far: no vacuum leak, ect sensor seems to be good, timing is right about 14 degrees, no backfire, and so on. but i cannot seem to get the tps right, and the vacuum is wierd cause i seem to get more with a little throttle. i have vacuum to the fuel pressure regulator. if you can PLEASE HELP! i am going nuts. Thank You in andvance.

Jacob5.0 · Apr 25, 2010

Nothing?

88-378 · Apr 25, 2010

Fuel pressure should be at 39 with vac line off.

Kdubslugga · Apr 25, 2010

its normal for vacuum to increase under light load, it should drop to 0 under WOT though, are there any codes in the computer, just because the light isnt on doesnt mean there isnt a code somewhere. Also, are your plugs soaked in gas or are they just covered in like black soot stuff??

tannerc91gt · Apr 25, 2010

Jacob5.0 said:
hyperpuleptic pistons

i think i found the problem, you're supposed to you the pulp free pistons!

Jacob5.0 · Apr 25, 2010

the plugs are covered in black soot... i clean them real well with some carb cleaner and they will go again for a little while. I havent pulled any codes yet i will try to do that tomorrow. but the weird thing is, is that i cant get the TPS right. would this cause it? i dont know if it is faulty or if i have a bad ground somewhere.

5.0W/5.0 · Apr 25, 2010

tannerc91gt said:
i think i found the problem, you're supposed to you the pulp free pistons!

LOL...I saw that too!

tannerc91gt · Apr 25, 2010

you still havent said what your FP is even at? do you have an adjustable regulator?

HISSIN50 · Apr 26, 2010

Any codes?
Does the EEC know you have 24's (either a calibrated MAF, self-tuning, or a Cobra EEC)?

Jacob5.0 · Apr 26, 2010

im going to pull the codes today. stock regulator, stock mass air, and A9P computer. i have not got a tune yet i was trying to figure this out first. i know i need to upgrade the mass air and i expected it to run a bit rich, just not like this.

Jacob5.0 · Apr 26, 2010

sorry about the mispelling of hyperelliptic pistons i guess i should have gotten the right spelling. i ran the codes and there were ALOT of them. so here it goes:

51- ECT sensor out of range indicated/circuit open
22- MAP or BARO sensor out of range
53- fuel inj. pump lever sensor input is greater than self test
53- TPS above maximum voltage
54- Intake air charge sensor circuit open; vane air flow sensor out of range
31- EVP or PFE circuit below min. voltage
67- clutch switch circuit failure
67- neutral drive switch circuit failure/open
67- A/C input high
81- air diverter solenoid fault, intake air control circuit fault/air inj. diverter
82- air diverter solenoid circuit fault or supercharger bypass circuit fault
82- Intergrated relay control module
85- canister purge solenoid circuit failure
85- adaptive fuel limit reached lean
85- shift solenoid 3/4-4/3
84- EGR vacuum regulator circuit failer

definitions straight out of the book... i have deleted the egr and the canister purge so that should eleminate some, i guess now which ones would be causing it to run rich, i will do reseach of my own to help find out. help is welcome also. thanks

HISSIN50 · Apr 26, 2010

No biggie about the hypereutectic pistons. Most folks don't care how you spell stuff on here as long as you try.

Was the car up to temperature when you pulled codes? If not, that can generate an ECT code.

I would use a DMM to see what the TPS is showing at rest.

Jacob5.0 · Apr 26, 2010

no it was cold, i wanted to pull the codes before i ran it and fouled the plugs again, i guess what is next is do a running hot test. and see what i pull then. if i am getting a temp reading does that mean my ECT is good? thats what i figured. any help on these codes would be great, thanks.

Jacob5.0 · Apr 26, 2010

and also i have tried to set the tps... i know it is pretty straight forward and i have done it before, but i cannot seem to get it to work at all, even if i some how get it to .9 i push the throttle and it does not go up like it should. it stays the same. it stays at like 4.5 and does not move. i will wiggle the damn thing and no change. bad ground? bad TPS? even though it is new.

HISSIN50 · Apr 27, 2010

Disconnect the TPS electrical connector and test each wire.

If ok, put your old TPS on or try a spare (or do continuity testing on this one).

If your TPS is sending a signal that large, the car would run like poop. Be sure you're testing the proper wire (and not the 5V power source to the sensor).

Jacob5.0 · Apr 27, 2010

I talked with a guy that i work with and he said i need a thermostat in there and that it is staying at closed loop... i know i do not have one in there. so i guess what i am asking is would that cause some of these problem codes?

HISSIN50 · Apr 27, 2010

I think you meant open loop.

The O2's are what control open and closed loop. Not the T-stat.

Install a quality t-stat anyways.

Jacob5.0 · Apr 27, 2010

i will pick one up tomorrow

Jacob5.0 · Apr 27, 2010

i checked the wires going into the tps plug and got -2.4 on the green to black and .6 on the orange to black. i thought it should be .9 and 5.

Jacob5.0 · Apr 27, 2010

OK! finally making some headway... i had a bad ground on the TPS so I can take care of that. now that being said would a ground be causing the other trouble codes?

Running super super rich

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