Garrett Powered Posted May 6, 2013 Report Share Posted May 6, 2013 you will see if you datalog Quote Link to comment Share on other sites More sharing options...
95LQ1VERT Posted May 6, 2013 Report Share Posted May 6, 2013 When I had this problem, as in just starting the car it would sometimes hit rev limiter by itself, other times the idle would hang and not come down, resulted in my Throttle Position Sensor being bad. It was giving the wrong input voltage thus making seem like the throttle was being applied at so many %. Like said above you need to see the datalog to find the issue. You could have even got a "bad out of the box" TPS? Quote Link to comment Share on other sites More sharing options...
cessna Posted May 6, 2013 Author Report Share Posted May 6, 2013 Thanks for the input will check this ...........what should i look for in datalog ? input voltage to tps ? Quote Link to comment Share on other sites More sharing options...
95LQ1VERT Posted May 6, 2013 Report Share Posted May 6, 2013 IIRC @ idle the TPS voltage shouldnt be more than .58 v give or take and my IAC valve was at 7, I may need to confirm those later tonight. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 7, 2013 Report Share Posted May 7, 2013 TPS voltage should be NEAR .5 volts at an idle, but TPS% needs to be 0 or 0.39% at idle. anything else and oddities will pop up. Quote Link to comment Share on other sites More sharing options...
95LQ1VERT Posted May 7, 2013 Report Share Posted May 7, 2013 Thanks Robert, I forgot that part. Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 (edited) thanks will check Edited May 7, 2013 by cessna Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 Quick question how do I get the car to idle to check these items....when I start it up it revs to 3k and slowly drops to 2k never going to idle say at 750or 800 when I put it in gear it drops to about 1.5 k Quote Link to comment Share on other sites More sharing options...
Garrett Powered Posted May 7, 2013 Report Share Posted May 7, 2013 how many times are you going to ask that? Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 how many times are you going to ask that? im asking because they are telling me to check tps voltage at idle and percentage should be around 0 to 39 at idle how do I do that if it wont idle ?????? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 7, 2013 Report Share Posted May 7, 2013 with the throttle fully closed, you should see 0 or 0.39 %, regardless of RPM. if it's anything above that, it could be what is causing your high idle. Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 Thanks Robert I'm just a harry homeowner with very limited tech exp. on vehicles but gotta save what little money I have things are tuff ......so thats why im trying to find out if it could be something a little less expensive or not as time consuming like trying to change intake gaskets ....only to find out thats not the issue here ....I borrowed a co-workers code reader and hooked it up earliar and from what I remember it showed the tps at 55 .....I will double check and get back .....thanks for all the help with this ...... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 7, 2013 Report Share Posted May 7, 2013 be sure to check both TPS voltage AND %, one does not always indicate the other. Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 Hey Robert this is what I got from data stream dont know how to print it off but wrote down what I thought would be helpful ....coolant 170,egr command off,rpm 1200 in gear,ex o2-lean,IAC-posistion 0,maf-45, map hg-14.61, map-v 2.06, iat 79, thottle 0, tps sensor 0.55 .....the tps sensor I replaced 2 days ago .......anything that I missed that might help out ..... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 7, 2013 Report Share Posted May 7, 2013 IAC position of 0 = massive vacuum leak. Quote Link to comment Share on other sites More sharing options...
cessna Posted May 7, 2013 Author Report Share Posted May 7, 2013 so sounds like intakes ? all lines seem to be fine, unless theres one under somewhere that I dont see but I doubt it ....thanks Robert I guess I got to get something together this weekend for the intakes............thank you everyone for the help . Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted May 7, 2013 Report Share Posted May 7, 2013 closed throttle, 1200RPM in gear at ~49.2kPa with 0 IAC counts, it's a giant leak. if it's not the UIM or LIM gaskets, i'll be amazed. Quote Link to comment Share on other sites More sharing options...
cessna Posted May 8, 2013 Author Report Share Posted May 8, 2013 Hey Robert question for you when I pickup intake gaskets is there any other gaskets or seals I should get also ? egr, thermostat, what about injector seals ? I see that the oil pump shaft seal leaks quite often on these some people have a fix that seems to work well any input is welcome ........thanks for your help and anyone else Quote Link to comment Share on other sites More sharing options...
cessna Posted May 10, 2013 Author Report Share Posted May 10, 2013 OK just want to let everyone know the job is done and I want to thank everyone that helped me out beleive me your help was needed great ideas from you guys , what did help was the one where you swing the rail up out of the way no need to dissconnect yes that works great thankyou ....UIM AND LIM finished ,,,,,,,quite a bit of fun for the first time this enigine seems to be quite a hemroid ...lol now working on new plug wires that also looks like fun anyone got any suggestions for this ............... Quote Link to comment Share on other sites More sharing options...
cessna Posted May 10, 2013 Author Report Share Posted May 10, 2013 (edited) Ok need some help again........fired car up ran for a few minutes got coolant sensor code 15 fan came on as soon as I started it possible short or something not hooked up ,checked everything over found sensor wire not hooked up that problem fixed, Now tried to stat it again now it won't fire just turns over is there something I missed with fuel system possibly ? bleed air from rail or anything like that ? Any help greatly app. Edited May 10, 2013 by cessna Quote Link to comment Share on other sites More sharing options...
cessna Posted May 10, 2013 Author Report Share Posted May 10, 2013 Cancel the help,,,,,, She's running now and better than ever idle is perfect plenty of power now ,gaskets stink like shit but in due time that will be gone, thanks for the help once again.....going for a ride....... Quote Link to comment Share on other sites More sharing options...
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