91gen2runner

91 runner hesitates after long idle doesn't respond when gas is pushed but then slowly gets going. Also idles lower and lower at long lights and then when gas is pushed it fails to rev up, one time it wouldn't go at all and lunged thruogh the intersection, then I put it in N and reved before slipping back into drive, off I went. Had it looked at and test drove, they replaced the tps sensor and set it high I think, becouse now it wont idle low but all the same problems are there with the accelerater not responding at times. Could this simply be the fuel pump, I had the fuel filter replaced a couple months ago and things were running perfect then. Respectable shop says its not the trans but who knows. Please help a fellow toyota fool.

justin_4runner

have u looked over all the vacuum lines? sounds like more a vacuum issue then gas,

91gen2runner

Are there any other possibilities, could it be the catalitic coverter? How would I know if the vacume lines are alright they all seem to be hooked up. Why would the truck run good sometimes and bad others on the same trip.

justin_4runner

are u getting any codes? it can be a sensor that is bad or loose wire, or vacuum line that has a leak on the back side that unless u inspect it u wont know. i dont think it would be the cat. do u have the smell like rotten eggs coming from the tail pipe?

91gen2runner

As a matter of fact I hit a hill that had been giving me problems today, I got up it slowly and could smell rotten eggs the rest of the way to my friends house. More sulfer than I have ever smelled from it before

91gen2runner

So, could a bad catalitic cause los of power and irratic shifting and my other symptoms, I live in northern az where there are no emmision regulations so mine is original with 197,000 mi.

justin_4runner

one thing to do is pull the cat out and take a flash light and look threw it see if u can see the light threw it, it could be plugged.

91gen2runner

I will do it tomorrow, would it be alright to test drive it without the cat hooked up, theoreticly it would run better right?

justin_4runner

it is going to really be loud and it might not have much back pressure so it will pop and rev up quick.

91gen2runner

Drove it without cat for a liitle, still seemed to have the same loss of power and non responsive accelerator. What would the symptoms be if the o2 sensor was faulty, maybe its that.

91gen2runner

So I found that the egr and the vacume lines right in front were all cloged. One is actually completely clogged might have to bypass them with new line, also got a denso egr for 40 bucks new on ebay. Im hopefull this along with the new denso o2, that's also on the way whether I need it or not, will fix all my issues.