zeromage428

when i drive normally, all of a sudden my car decides to hesitate, not like where its at 3k or anything ill be driving in 4th gear n be around 4500-5500 n then all of a sudden its like as if i get no spark from the plugs, n my car just decides to stop accelerating n starts to decelerate as if when u run your car on empty.

today on my way to school it happened again, this started yesterday but today i was driving n then it just stopped working completely, but i was still moving but my car acted as if it stalled, so i shifted into neutral and then started the 7 back up while i was moving

could this be a timing problem? I have a 88 vert with a rebuilt engine about 10k miles ago no throttle body mod or any yet, just an exhaust, and a recent upgrade to the koyo radiator

rotaryjunky

I would guess a fuel filter or fuel pump. I bought my car with a faulty fuel pump. It could also be bad gas or water in the gas.

zeromage428

i noticed that when im in my car and when the "no gas" decelerating thing starts to happen i hear a clicking noise in my gauge cluster, it clicks when it starts to decelerate and then clicks again when it turns back on.....

zeromage428

well, my engine light doesnt come up, it just starts to die n then slowly decelerates still the engine isnt turning like if u were to drive n then turn the key off...cant be my battery becuase i just got it tested, and cant be my alternator cuz everything stays on even when my car stops, ergh this does blow, the only way for me to get around town is to keep turning on the engine n turning it off, i turn it off when it starts to hesitate n then turn it back on n itll give me like 3 seconds of acceleration and i thought it did it in a random gear but it doesnt, also another thing is that it seems to do this only to when i am moving....

Russ-R

Might be your fuel pressure regulator.......happened to me over the weekend. When driving I would hit the gas just like you said but it just wouldnt go. Finally it just closed and never opened back up.

ramtookrazy

i just had a similar problem. does it stutter a lot or feels like it doesnt wanna go WOT? it could be your secondary injectors, which was my problem. anything where i gave a lot og gas, it would stutter as if it were going to stall out.

zeromage428

i can feel it giving gas if i lightly tap the gas peddle, itll give gas but nothing pass the distance of the "tapping" the peddle, but would that explain of why it doesnt shut off when im not moving, meaning i come to a complete stop, n then turn the car back on, n tehn it wont turn off or anything like it does when im moving

zeromage428

ok i just drove my car really quik and nothing happened...hmmm..maybe ill see what temperatur this happens at, ill post later tonight after i get off work

ramtookrazy

thats exactly what my problem was. as for the rest of it i cant be too sure. "sounds like it happens whenever your secondaries go HELLO!" thats what someone told me. i changed my fuel filter and still had that problem. i skipped replacing my fuel pump cause i thought maybe the injectors would be the more likely cause.

zeromage428

when do the secondaires actually work??? because i can go full throttle and everything right now that since my car has been sitting for a bit, but i bet a little later of driving for more than 20 min ittl start hessitating again

(im a nub to mechanics n willing to learn with this car)

ramtookrazy

im a nub also! it just sounded similar to my recent problem. i only fixed it a few days ago after its been sitting for two weeks. at first it sounded like my problem but im not too sure now. but with a problem like that it could be anything.

onePOINTthree

the secondarys open at 3800rpm, using a ground kit could solve this problem

Aaron Cake

iTrader: (1)

TPS unplugged or faulty?

zeromage428

alright thanks, n ill try the grounding kit when i have the money

zeromage428

also, would that fuel injector stuff harm the engine at all??? the stuff u put in ur gas thats suppose to clean them out?? or is that just bullshit stuff, just wondering if its worth a try n to see if theyre clogged up

HAILERS

It has all the characteristics of a bad tps. One of the things a tps does, is cut the fuel when you LET OFF the throttle. If your tps has a bad spot in it, it could be sending the ECU a signal that *Hey, I've Let Off the Throttle*, and the ECU cuts the fuel off, until the tps wiper reaches a good place and then the ECU resumes sending fuel.

Heat is one thing that could effect a marginal tps's pot. Might work just fine when the engine is cool, but once fully hot, the open in the pot shows up and you get the results you have now.

Or it could be another thing all together. You need to put a (preferably analog) meter on the tps and run it thru its full range, looking for open spots.

zeromage428

hmm, ill check the tps this weekend

zeromage428

would that explain that clicking noise in the dash though?

SureShot

Aaron got it - the TPS.
Using test lights or voltage at idle readings will get your idle setting perfect, but you could still have a worn out TPS resistor.
-The golden test:
Unplug the TPS connector.
Clip a cheap analog (needle type) VOM on the orange & black pins.
Set it to the 1K scale.
Hold off the throttle & work the short range TPS plunger in & out.
You should see a smooth sweep from ~0 to ~5K ohms.
Any bad spots or drop outs in the stroke - it's bad & will give fuel cuts at part throttle.
(Before you toss it, try spray contact cleaner between the sleeve & plunger.)
- Then set it:
Find the fast idle (warm-up) cam & back it off so the throttle sits on the hard idle stop.
Adjust the setting to 1K ohms.
While holding off the fast idle cam, open & close the throttle a few times to see that the 1K setting repeats.

zeromage428

thnx alot, ill ask the nieghborhood electrician guy to borrow his meter this weekend

Donn Hecht

For me sounds like a bad TPS like Sureshot, and Aaron said.
I had the same problem on my Turbo-II I replaced it with a new one
problem solved.

zeromage428

aight well im looking for a new one right now, well, preferably a used one, i can get off of the victoria british catalog for like 150 shipped, should i just go to the local junkyard n try to use one of them first, or to just go with a brand new one?

zeromage428

from how you guys are explaining it im pretty sure its the tps now, its been acting up only when it gets near about 1/3 up the temp gauge, thats when the fuel starts getting cut n what not, going to the junkyard tomorow to try n find a used one, anybody have any requests for parts they need??? just post n ill get them

zeromage428

*update*

i just installed a new tps
and its still doing the same thing
ergh what else could be wrong?

ntempleton

you could reground the car yourself, but it would be hard. the grounding kit would probably make things a little easier.