This suv is driving me crazy, It starts idles,but when it warms up rough idle, smells rich like gas and exhaust fumes. we have cut the cat off, help a little not much, replaced idle valve,dist cap, wires spark plugs,hoses,new water pump,thermostat, cleaned out throttle body, replaced trottle postioning switch, asi motor,trottle temp control switch, trottle control switch. nothing very discussed. thought maybe egr valve it doesn't have one now what? can anybody help?

 

Cutting the cant wont help anything. You replace the cap and rotor? You replace the coil? Are you 100% sure your battery/alternator is good? You run through to check for vacuum leaks? Node the injectors? etc etc

 

did you check the upstream O2 sensors? they control the a/f mixture once the engine warms up

 

check fuel pressure, check to see how fast it bleeds off, you may have a ruptured fuel pres regulator.

You should be getting codes sets of some kind, misfire & o2 come to mind even if they are only sympethetic & a result of your real problem.

Are you sure no codes are being set & that someone didn't pull the bulb?

try to set some codes, unplug a cyl & try to get a misfire code, unplug an o2 sensor & see if it registers.

Do you have the means to observe the data stream? if yes can you post up idle data?

need more info, need results of all diag tests you have preformed. in the meantime STOP THROWING PARTS AT IT!! lets figgure out what it needs.

do you have a dvom or a scanner? at least a code reader? need to know what you have to work with.

if you can get data stream compare Intake air temp to eng temp. on a cold motor these should be within a few degrees of each other.

as the engine warms injector pulse width should narrow, injector on time gets shorter.

If you do find it is storing a code give us the freeze frame data, data frozen at code set.

 

the fuel pressure cold is 42 and warm 47, at first check engine light was on, took it to garage they said injecter 5 was bad, we didn't think that was all but they guarenteed it, went to pick it up they said they hooked it back up and intake gasket was bad, we took it home and replaced intake gasket.we have hand held scanner from advanced auto.
state obd check:
monitors ok 4
monitors in
monitars n/a 5
abs lt tps % 14.5-14.9
eng speed rpm 896 -885
cal load% 10.9-10.1
map kpa 65- 70
coolant f 77 80
iat 71 -69
ign advanced de 0.0 10 8,12.5 5. all over the place
st firm 1 27.2 -33
lt firm 1 no reading until 1500 rpm
fuel sys clsd
fuel sys 2 n/a
o2s iiv .50-.58
st ftrmll -19,-21.5
02s12v 1.0
pto status disen
obd2 stat us

the abs light is on, been on the whole time.
could it be the module on the trottle body? cleaned out throrrtle body never changed module.
someone said to crimp return fuel line and test fuel pressure to see if regulater was bad, but no return line?
what do you think

 

Yea check the maf sensor and O2 sensors

 

Fuel pump is bad with only 42 psi.


What tune up name brand and type of parts did you install?

 

we used napa brand parts, the plugs where replaced twice, the first set fouled and had gas on them from an o ring on injecter.

 

i would replace the pick-up coil underneath the rotor in the dist cap. been through all of this twice. both times the pick-up coil was the problem

 

this year doesn't have maf sensor, no o2 sensors on it right now,we cut off from y pipe back, need replaced anyway. maybe fuel regulater?