really lost.. runs terrible

[ty1025]

ok, so the typhoon didnt idle all that well when i bought it but it drove great even under boost and shifted hard, i figured, just a simple tune up??. well, drove it alot like 1000+ miles in 2.5 weeks, then one night coming home i got on it and i believe i was in third gear when it downshifted, it hit 15lbs then dropped to 10 then climbed again and went past 15 and i let off at 16lbs of boost since its a 2 bar. after that when i tried to accelerate it bogged bad and the idle was now terrible.(idles like a big cam). my vaccume is 15hg at idle now and was 20+ b4. My fp was and has been since i got it, 32psi at idle and 50 under high boost.( i have a afpr). i did a compression test and everything checked out fine,pressurized the intk and found that the tb was leaking a lil frm the shaft like usual, timing was zero with brn wire unhooked and around 12 with it hooked up at idle) i ohmed the injs and they were all 14-15 ohms. new plugs(ur5) wires(taylor) cap and rotor(duralast gold). still runs crappy. has a code 44 which is running lean. but smells like fuel bad out the exhaust??. and a low vaccume code frm the map. i had previously unhooked the egr from vaccume and plugged the line since it was making the ty surge in 3rd gear while crusing.but it was unhooked for some time. so i now was getting a egr sytem failure code also(turns on and off at freeway speeds.) Anyway, backfires when u try to open the throttle by hand and shakes the whole truck really bad around 1500rpm. datamaster is on its way but i just want to know now!! any help would be very nice.(msd blaster coil was on it when i got it)

also every diagram that i look at shows the flat part of the distributor pointing towards the driver, mine is pointing straight back parelle with the firewall?? timing is fine tho along with the firing order according to where the screws are on the cap. possible problem? i was thinking blown intake gaskets? map sensor bad? bad throttle position? bad ignition module?bad coil? i have checked all the vaccume lines and zip tied like everything down. just got it and the last guy didn't know anything abt it so im just guessing with everything that has been done to it ( has paperwork that the head gaskets were done 2yrs ago so i'm assuming intk was also done in the process. im lost...

 

[turbodig]

Re: really lost.. runs terrible

ok, so the typhoon didnt idle all that well when i bought it but it drove great even under boost and shifted hard, i figured, just a simple tune up??. well, drove it alot like 1000+ miles in 2.5 weeks, then one night coming home i got on it and i believe i was in third gear when it downshifted, it hit 15lbs then dropped to 10 then climbed again and went past 15 and i let off at 16lbs of boost since its a 2 bar. after that when i tried to accelerate it bogged bad and the idle was now terrible.(idles like a big cam). my vaccume is 15hg at idle now and was 20+ b4. My fp was and has been since i got it, 32psi at idle and 50 under high boost.( i have a afpr). i did a compression test and everything checked out fine,, timing was zero with brn wire unhooked and around 12 with it hooked up) i ohmed the injs and they were all 14-15 ohms. new plugs(ur5) wires(taylor) cap and rotor(duralast gold). still runs crappy. has a code 44 which is running lean. but smells like fuel bad out the exhaust??. and a low vaccume code frm the map. i had previously unhooked the egr from vaccume and plugged the line since it was making the ty surge in 3rd gear while crusing.but it was unhooked for some time. so i now was getting a egr sytem failure code also(turns on and off at freeway speeds.) backfires when u try to open the throttle by hand and shakes the whole truck really bad around 1500rpm. datamaster is on its way but i just want to know now!! any help would be very nice

I'd check for a split IC hose, or a blown lower intake gasket. Given the behavior, I'd lean towards something downwind of the TB leaking.

Inner-tube pressure test on the IC might point out the leak for ya.

 

[ty1025]

Re: really lost.. runs terrible

did the inner tube pressure test and found leak at tb shaft like they all get, i dont think i would make it run this terrible tho, when you perform this test should the tube remain pressurized? or will it bleed off slowly thru the rings and what not? i plugged off all vaccume connections to the intake also to eliminate variables and ran it that way and ran the same?

 

[WyoSyclone]

Re: really lost.. runs terrible

...and remember, doing the pressure test on the intake doesn't work upstream of the checkvalves... you could have a leak upstream of one of them.

 

[Ty 1885]

Re: really lost.. runs terrible

32 psi fp is too low. Bring it up to 40 with hose off. How much fuel in the tank ? Anything less than half a tank, it will run bad under boost.

 

[Andreas]

Re: really lost.. runs terrible

It wouldnt hurt try another MAP sensor. A bad one really messes up the AFR.
Been there.

 

[ty1025]

Re: really lost.. runs terrible

when the hose is off its like 41psi fuel pressure. hose on = 32psi. i did crank it up and the idle evened out a bit but not much it was still terrible, the plugs i pulled out and replaced after this incident happened smelled like gas and were wet but im getting a lean condition code on the o2 and a strong fuel smell out the exhaust? :rant: i guess i just ned the data master to come(friday!!!!). any suggestions till then would be very much appreciated and thanks for the help. also 3/4 tank of gas 93 octane!

 

[NecroWolf]

Re: really lost.. runs terrible

do a compression test yet?

 

[syclone0209]

Re: really lost.. runs terrible

you said that you unhooked the tan wire and the timing was zero and then hooked it up and it was at 12 deg. shouldnt the timing at idle be around 20 to 30?

 

[syclone0209]

Re: really lost.. runs terrible

could he have a bad eprom or ecm and be in limp fueling?

 

[ty1025]

Re: really lost.. runs terrible

yeah compression checked out ok an all cylinders, and with a timing light on it thats what it looked like at idle(12-15deg). and would an eprom go bad like that just instantly?after lettin off? also im assuming datamaster might tell me if the eprom has failed? or wouldnt i get a engine code that was ecm failure? im pretty sure someone f-ed with the wastegate rod and i think thats why its trying to over boost occasionally even with all the vaccume lines hooked up and zip tied down? but thats another issue. and if anyone knows what timing should be at idle with the tan wire hooked up i would like to know, im gonna search when i gt home, as im at work rite now. thanks

 

[NecroWolf]

Re: really lost.. runs terrible

are you sure the balancer hasn't walked? that would make all your timing off. what were the numbers on your compression test? checked for blow by?

 

[nello]

Re: really lost.. runs terrible

have some patience man. You can do some basic tune up and checkup stuff but you really need to wait until DM is hooked up or you'll just be :banghead: It could be a number of things, or, something simple. Put it to bed until you get the right tools. I don't know for sure DM would tell you your chip is bad, but it will tell you if it's a stock chip or not. You should be checking for knock first thing anyway, cause it wont take long for that thing to pop!

Otherwise I'm with Dig, lower intake leak.

 

[ty1025]

Re: really lost.. runs terrible

yeah i need the datamaster bad. im not driving the thing or running it too long so i don't hurt it. the first compression test i did before the incident revealed 150ish on all cyls but i realized i forgot to open up the throttle blades and it was at operating temp with all plugs removed. i know that may be semi low according to some of the posts here but it may have been higher if i had opened them, i did another after the incident and i admit i didnt have much heat in it as i didn't know exactly what was wrong and didn't want to hurt it and it was 147- 149 on all cyls. so no cyl had any noticeable low compression issues. i just need to figure out whats up with it and if it has a stock chip or not? the previous owner knew basically nothing and had it for like a week and acquired it in a trade and decided he wanted the money? dose anyone know who has owned this typhoon? i think its originally a michigan truck(where i'm from) and its number 1025?

 

[ty1025]

Re: really lost.. runs terrible

ok got the datamaster on it and my st fuel trim was above 200 at idle long term was 138 so lean also, so apparently its running really lean, while in monitor revving it, it never went into rich in closed loop, it hit 138 st once or twice but always lean otherwise fr both the whole time even on the two recordings i made it never went rich except for maybe a millisecond but thats it?, also my egr dc and tgt register every time i hit the throttle, not really a direct connection between that and the lean according to datamaster but it may not be seating correctly or something stupid, no knock whatsoever at idle or lightly driving it wich is like the only thin i can do bc its running so badly i cant build more thatn lik 2000 rpm, but when i put it in first and tried to build some rpm it began spark retarding arund 2400 rpm but 4-5 were the highest it got? and i was backfiring like the whole time so if its running this lean then im thinking lwr intk, or egr not seating, but i dont think that it would just suddenly not seat correctly especially after i pulled it and cleaned it out and blew on it as hard as i could and my cheeks almost exploded.(yeah i know how that sounds so ha ha) im gonna order gaskets, whats everyones opinion on the FELPRO lower intk gaskets for stock heads and intake>? thanks guys also my vaccume is inconsistent it was 15hg at idle before then after driving it it ranges from 15-20, it will sit on a value but will return to a diff one later? uhh how hard is the LIM on these things?

 

[SloGN]

Re: really lost.. runs terrible

get a timing light and check the timing. my bet is you will find the timing is bouncing all over the place. i have had in my sy and a friend ty had the same issues as you and it turned out the dist was going bad.


My sy was so bad it would not hardly pull off from a idle without poping thru the intake sometimes and just run really slow with no power my friends ty had a very bad idle issue with a big stumble.