87POSGTA

well ever since my HSR install my car ive had a serious problem with popping/bogging when i go past more than about 1/6 on the throttle. Ive tried tuning my FP w/o a gauge due to the fact that i cant find a fitting that will allow my old one i used on my TPI's Schrader valve. Ive also attempted to burn my fair share of chips and still running pig rich to no avail. From what it looks like for one my TPS is bad. wont go past 2 volts even at WOT. Ive gone back to a stock APYP bin for now and im gonna start workin it from there. Just wanted to get some pointers from you guys.

my datalog is on my website www.domestic-disturbance.net on the members page, if anyone wouldnt mind taking a peek.

Slow89Iroc-Z

well your blm in 108 at idle...so it is bottomed out....scale the 80kpa area in the ve table around 900-1000rpm. The numbers should be scaled like (108/128) x (current value). The do another scan and do the correction (blm/128)xve. The do some runs and let vemaster tackle the rest.

VetNutJim

From the scan, I'd say your TPS is difinitely bad.

Fix that first then scan again.

eric305TPI

First make sure the tps can range between .54 and 4 volts. Make sure your injector constant is set to what your injectors are. Then work on the fuel/Maf tables to get the BLM in the 128 area. The HSR requires quite a bit more AE fuel to keep it happy on acceleration. Good luck

87POSGTA

well my injectors are ford pink tops, 21lbs by their measurements. but if i recall they run fine as 22# on our cars with the FP set at 43 if im correct, but hell after swapping to the HSR it seems most of what i used to know is wrong heh. hooked up my A/F ratio gauge today and that led drops off the scale when i try to give it some get-up and go. looks like tomorrow im gonna pick up that TPS and then fill 'er up and get some more datalogs in.....horray for test and tune days (anyone in NJ wanna help me burn a chip, i pay in beer and food) heh.

onebinky

iTrader: (1)

Take a DVOM and hook one lead up to the signal wire (middle wire on the TPS IIRC), and hook the other one to the ground reference wire. I'm pretty sure that's the bottom one. Then with the key in the on position, slowly open the throttle up, and watch the DVOM. Like Eric said, you should get a relatively smooth increase in voltage from about .5v to almost 5v in some cases. If you do infact get up to 4.5-5v, that tells you that the problem lies in a bad or corroded wire or connection somewhere. Also test the top wire, and make sure that it is 5v. That's your reference voltage. If that's low, all your other readings will be as well.

87POSGTA

yea, seems like i got some bad wires, cause my datalogs tell me that its not going past 1.54 volts but when i test with the DVOM im getting about 4 volts. my TPS wires had a cut in it so i replaced it with a GM pigtail and still have the same problem. this car never gives me a break. what steps should i take next

onebinky

iTrader: (1)

You may have to go further back in the wire. If you had cuts in the insulation and corrosion set in, it tends to "wick" back under the insulation and eventually will eat away at an entire length of wire. Also, for ECM related items, it is almost a nessesity to solder all connections you make. Remember, it's only a 5v reference, and very low amperage. About 500mA if I remember correctly. Any loose connections or corrosion in there, and it doesn't have the "push" it needs to bridge the gap. Could very well be the reason for the massive voltage drop. Good luck tracing it

onebinky

iTrader: (1)

Also, try back probing the tps wires at the ECM plug, and see what voltage reading you are getting. Then unplug the ECM plugs, clean the connections, plug it back in, and retest. If the voltage is back up, that was the problem.

87POSGTA

well i cleaned just about every damn connection i could clean and well it worked woo! its great having most of my drivability back. onebinky, thanks for the replies, u helped a great deal. i cleaned everything and swapped to a spare ECM i had lying around just in case that was the problem, now i can get this POS inspected and legal. binky if ur ever in NJ let me know, i'll buy you a round for the help.

onebinky

iTrader: (1)

hmm... I like beer Maybe I'll have to fly out there and take you up on the offer

Great to hear you found it though, those electrical problems can be a b**ch to find sometimes.

Glad I could help