PKRWD i need you help??

Coupe50h · 06-10-2003, 04:34 AM

Im having a surging/ stalling problem, i just installed an explorer intake, and from what i understand, all of the vaccum lines are correct and working, i looked at some of your old post on using a vac guage, very useful info i might add, you also helped a guy that said he got a (code 98) and told him it was his maf sensor?

Well i pulled codes, and 98 was one of them, the car seems to do it when warm mostly, also i tried pulling the maf plug while the motor runs, the motor dies? so does that mean the maf snsor is good? possibly failing only sometimes? can k@n oil affect it?

plz help, im at a dead end, and i have some camaros that need to be showed whos boss!
thnx

Coupe50h · 06-10-2003, 04:38 AM

oh yea, i blocked off my egr because it was screwed up, and the car ran better after that, but only for a while, then it started up again, probaly worse

this is dangerous, being the car kinda gets hard to turn out of an intersection with a non running motor.

PKRWUD · 06-10-2003, 07:25 AM

Okay, first off, code 98 is a hard system failure. Not a good thing. Could be the ECM.

Second, K&N oil will screw with the MAF, and cause drivability issues like you described.

Third, you should be able to disconnect the MAF, and still start the engine, and have it idle.

If you have a K&N on, and it's too oily, clean it and re-oil it, but don't be so generous with the oil. Clean the wire inside the MAF with a q-tip and rubbing alcohol. Be very gentle. Reset the ECM, and run KOEO codes. If you get any codes, post them. if not, run a KOER test, and post the results.

Coupe50h · 06-10-2003, 04:45 PM

alright, i didnt run codes yet, but last time i did the 98 didnt show up, it only did when i left my ect sensor out? now that is fixed i think.
btw koeoff test always pass with 11.

Today i was looking at the back of the intake, near where the pcv is, and i must have some sort of leak there? there is oily water there on the bellhousing, i stuck my hand back there with the motor runnnig and cant find any leaks? i pulled off my line that goes to the vac tree from the intake, and the motor died, that tells me i have a vacuum leak somewhere correct? probaly the hissing i hear on the backside of the intake, i'll pull it all back off if i have to, i used rtv on the ends, i remember being kinda short on rtv cuz i ran out, but i figured it was enough since it was a good size bead.

If the lower wasnt sealed on the end, what would leak out besides air?

pkrwd thanx alot.

Coupe50h · 06-10-2003, 07:39 PM

I used a vacuum tester today and since the idle surges like crazy, i cant get an accurarte reading, but playing with the throttle, i can get it smoothed out between 10-12 inches of vac.
that seems normal?

im going to try running codes again, i am running out of options, i just lost my job, so i cant afford to replace everything

the tps voltage is .97, plugs are new, only thing i hadnt changed is my plug wires, but every other tuneup i could think of has been done, i hav'nt had any o2 sensor codes. so i did not replace those, but i think i might have to do that next.......im so pissed, and ready to put my old intake back on.

Btw, it seems like pumping the brakes at a stop made it idle smoother.

PKRWUD · 06-11-2003, 01:59 AM

Clean your MAF, reset the ECM, and run KOEO codes. If that passes, run KOER codes. Post the results.

As far as your intake, the rear intake to block gasket doesn't effect the vacuum. The vacuum is inside the manifold, not underneath it. Your vacuum reading sounds low, but you have an E cam with 1.7 rockers, what do you expect? That's going to affect your idle quality as well. If you think you have a vacuum leak, get a camping size propane cylinder with a flame tip on it, and turn it on (but don't light it), and point it where ever you think you have a vacuum leak. If the idle speed picks up, you found your vacuum leak. Disconnecting the vacuum tree doesn't verify anything because I don't know what you've got attached to it. If you have a MAP/BAP attached to it, that could kill the engine. You need to create a vacuum leak that doesn't affect anything else. Try removing the vacuum line from the fpr, and see what happens. If it still stalls, then you probably have a vacuum leak, but if the idle goes up, then you don't. Also, you might want to get an aux. vacuum tank.

Take care,
~Chris

Coupe50h · 06-11-2003, 10:15 PM

hey pkrwd FIXED!!
today i changed the plug wires, had my friend make me an egr blockoff out of some sturdy aluminum, funny thing is the car acts like actually had too much vacuum, i created a minor leak poking a hole in one of the caps i have, i cant hear it whistle any louder than my bbk tb

also we played with the idle screw, rseting the ecm several times........thanx alot for the help. also i cleaned the pin connectors, seems to be idleing fine after the vacuum and egr changes though.

so much stress off my shoulders, now if only the spurs can pull this game off lol

06-10-2003, 04:34 AM	#1
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	PKRWD i need you help?? Im having a surging/ stalling problem, i just installed an explorer intake, and from what i understand, all of the vaccum lines are correct and working, i looked at some of your old post on using a vac guage, very useful info i might add, you also helped a guy that said he got a (code 98) and told him it was his maf sensor? Well i pulled codes, and 98 was one of them, the car seems to do it when warm mostly, also i tried pulling the maf plug while the motor runs, the motor dies? so does that mean the maf snsor is good? possibly failing only sometimes? can k@n oil affect it? plz help, im at a dead end, and i have some camaros that need to be showed whos boss! thnx __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-10-2003, 04:38 AM	#2
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	oh yea, i blocked off my egr because it was screwed up, and the car ran better after that, but only for a while, then it started up again, probaly worse this is dangerous, being the car kinda gets hard to turn out of an intersection with a non running motor. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-10-2003, 07:25 AM	#3
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Okay, first off, code 98 is a hard system failure. Not a good thing. Could be the ECM. Second, K&N oil will screw with the MAF, and cause drivability issues like you described. Third, you should be able to disconnect the MAF, and still start the engine, and have it idle. If you have a K&N on, and it's too oily, clean it and re-oil it, but don't be so generous with the oil. Clean the wire inside the MAF with a q-tip and rubbing alcohol. Be very gentle. Reset the ECM, and run KOEO codes. If you get any codes, post them. if not, run a KOER test, and post the results. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-10-2003, 04:45 PM	#4
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	alright, i didnt run codes yet, but last time i did the 98 didnt show up, it only did when i left my ect sensor out? now that is fixed i think. btw koeoff test always pass with 11. Today i was looking at the back of the intake, near where the pcv is, and i must have some sort of leak there? there is oily water there on the bellhousing, i stuck my hand back there with the motor runnnig and cant find any leaks? i pulled off my line that goes to the vac tree from the intake, and the motor died, that tells me i have a vacuum leak somewhere correct? probaly the hissing i hear on the backside of the intake, i'll pull it all back off if i have to, i used rtv on the ends, i remember being kinda short on rtv cuz i ran out, but i figured it was enough since it was a good size bead. If the lower wasnt sealed on the end, what would leak out besides air? pkrwd thanx alot. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-10-2003, 07:39 PM	#5
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	I used a vacuum tester today and since the idle surges like crazy, i cant get an accurarte reading, but playing with the throttle, i can get it smoothed out between 10-12 inches of vac. that seems normal? im going to try running codes again, i am running out of options, i just lost my job, so i cant afford to replace everything the tps voltage is .97, plugs are new, only thing i hadnt changed is my plug wires, but every other tuneup i could think of has been done, i hav'nt had any o2 sensor codes. so i did not replace those, but i think i might have to do that next.......im so pissed, and ready to put my old intake back on. Btw, it seems like pumping the brakes at a stop made it idle smoother. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-11-2003, 01:59 AM	#6
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Clean your MAF, reset the ECM, and run KOEO codes. If that passes, run KOER codes. Post the results. As far as your intake, the rear intake to block gasket doesn't effect the vacuum. The vacuum is inside the manifold, not underneath it. Your vacuum reading sounds low, but you have an E cam with 1.7 rockers, what do you expect? That's going to affect your idle quality as well. If you think you have a vacuum leak, get a camping size propane cylinder with a flame tip on it, and turn it on (but don't light it), and point it where ever you think you have a vacuum leak. If the idle speed picks up, you found your vacuum leak. Disconnecting the vacuum tree doesn't verify anything because I don't know what you've got attached to it. If you have a MAP/BAP attached to it, that could kill the engine. You need to create a vacuum leak that doesn't affect anything else. Try removing the vacuum line from the fpr, and see what happens. If it still stalls, then you probably have a vacuum leak, but if the idle goes up, then you don't. Also, you might want to get an aux. vacuum tank. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-11-2003, 10:15 PM	#7
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	hey pkrwd FIXED!! today i changed the plug wires, had my friend make me an egr blockoff out of some sturdy aluminum, funny thing is the car acts like actually had too much vacuum, i created a minor leak poking a hole in one of the caps i have, i cant hear it whistle any louder than my bbk tb also we played with the idle screw, rseting the ecm several times........thanx alot for the help. also i cleaned the pin connectors, seems to be idleing fine after the vacuum and egr changes though. so much stress off my shoulders, now if only the spurs can pull this game off lol __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

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