[quote=deeznutts77;359556][QUOTE=xxx;359545]congrates a working fuel gauge..
and good pressure if running, and low if not.yup got the one u said but it fills with fuel but works lol
Ok , Rome was not built in a day... old cars , are finicky. (i guess you are in the salt belt or spent long time there>? , Rust?
your car bogs.
with good fuel pressure that is:
1: good motor, got full compression?yup last post tested at 190 and 170 on all (you abandoned it, like max said)
sorry i can remember them all...
2: spark timed, to under hood sticker data stated?yup timed right on
3: spark advances off scale past 3000 RPM , does it? if not limphome. is happening, (lost power is normal for LIMP)no stays in spec no ses either The ECU does not always throw DTC for limphome, if it gets lost, i can not throw a code. ecu must know whats wrong to post a code.some times.
4: injectors clogged.? 1 or all. (do the balance test)swaped out for another set and ran cleaner thru 3 tanks (only the test proves if all 4 work right,not swaps. sonic cleaned excepted by pro shop)
5: dead or weak mAF, (use a scan tool check the maf)test ed good 002 at idle and 053g/s up hill floored
6: clogged air filter.have cone and cleaned it
7: the above if for bogging, and not flooding, (sparks not wet or black with fuel)
each of the above , has tests. ask for help
i presume you do not have full power up hills.if the hill is at start no but if im at 55 n up it goes no prob im not clear here.
bad fuel?many tanks later
o ordered cap wires and rotor and did a dizzy swap
oh, at 55mph you have full power, up hills,
this is not tip-in bog (a bad TPS)
its low injection rates, at mid speeds.
not fuel pressure
not cat clogged
seems the maf is weak or induction leaks?
what is the LTFT at light cruise.?
is it near zero/. or way off. ?+25% is air leak in the mAF induction path.
is closed loop happening at light cruise, scan tool?
I'm not sure exactly where the bogs happen, when, duration, etc.
this is key to diagnosis....
with a scan tool you can see if all inputs look normal. (and injector times)
like max said
a list of new parts?
a list of old parts tried,?
a list of test done and not done.
id be all over scan data, for sure at the malfunction point.
loss of power?. (no DTCs P30x stored) or pending>?
lost hot , i bet. and not ever cold
no loss of power, WOT.
spark tips black or ? white or ?
Fuel Milage, MPG?
Did you know that some CAI mods, make the MAF go nuts (page 40 in hartmans book below has this warning_)
read the chapter in Jeff Hartmans book on that.... he goes through that heavy, can happen below WOT only too.
one car they had the fan caused so much turbulence that the MAF went crazy.... I can link the page, easy.
"wind blast and fan effects" in the engine bay.
which brings up my joke, put it back to stock, then break it.
then you know why , it's broke.....
and a bouncing MAF will kill it. soon. as many CAI mods do,...
its only $1000 each too. (suz price)
there is a resonator there too, tuned to your 16v induction pulses... its not just for grins... See the reasons there... too. below. in the book.
this resonance , comes in to big play over 1/3 throttle "quote PRO FLO technolgies"
not only that they try to keep the air flow LAMINAR. that is going straight into the MAF, by Design. The intake on the MPI car is not just pipe, not at all.
page 167 covers MAF tricks.
1: tap sensor, does the voltage change, yes, bad,
he then goes to great lengths showing how to find odd MAF readings.
what does he do , he monitors injector pulse widths.
a: sees the do not increase with throttle foot movement under load. (maf or TPS issues)
b: sees it go way long, pulse, excessive, do to jumping to limphome , on the fly (maf drop outs?)
The MAF is a complex sensor, in fact the most complex on the vehicle. it can be fooled very easily and is very very hard to discover that fact. (dead is easY)
with a logging scan tool and maf logged and Injector pulse widths at same time. sure....
and TPS angle logs. if the injection rates are not right, look for bad ECU inputs.
Jeff is king!
case in points:
I tip-in throttle fast but short. i see injector not react fast (PW = longer, on closer examinations (tps graph plots) i see TPS dropping out on tip-in, plotted in real time..
oops a bad TPS.
I tip-in throttle and the TPS causes the enrich fast, but then the MAF bogs. then catches up. it delays or is acting odd ,not a linear flat increase (MAF issues) CAI?
The TPS gives the first power surge, followed by the maf, mafs are slower, but not that much. just a 1second or less.
The MAF TPS and senors must all work good to get power in all modes of driving
this includes, fully clean and working injectors.
if the injectors pulses are reacting properly (per above) and it bogs the injectors are failing. (or some very odd loss of fuel pressure on the fly)
keep in mind the when you accelerate the MASS air flow is very accurate (stock) and the non closed loop operations (accel) is totally dependent on that 1 sensor.
after that first enrich mode. messing with it , in any why , is a big mistake in my opinion,.