CA18DET Question

[Sideways s12]

Hey guys I need some help again I have this issue with the ca when driving and I try to accelerate from a stop it kinda bogs down and doesn't want to go then when it gets to a certain rpm it takes off but still rides rough and isn't running at it's full potential if I go WOT the boost gauge reads 15psi which is where it's set but it's def not 15psi the turbo is still good I've checked it. I almost think it's a tps problem but the way it's acting makes me think it's something else. ANYBODY have any ideas on what it could be also how can I check the tps to see if it's still good? Also the plug for the tps kinda fell apart so I had to wire it up using female plugs from autozone but I'm not sure what order the wires go in...Any help would appreciated thanks.

[Sideways s12]

Ok so I somewhat narrowed it down I swapped my tps out and it's better but not 100% I need to know if anyone has a plug for the tps because as i stated the plug part fell apart due to old age and excessive heat so I need a plug if anyone has lemme know....please

[fabio240]

I think the ka24e has the same plug as the tps will work from one of those

[fabio240]

Ok so I somewhat narrowed it down I swapped my tps out and it's better but not 100% I need to know if anyone has a plug for the tps because as i stated the plug part fell apart due to old age and excessive heat so I need a plug if anyone has lemme know....please

And I have an extra tps I can sell you for $15 shipped

[Sideways s12]

Will the plug work from a ca18et because I have a few of those also thanks for the offer on the tps but I only need the plug that plugs into the tb side of the tps....

[fabio240]

the one directly on the tps or the pigtail connector that is hanging from the tps?

[Sideways s12]

The pigtail that comes from the harness.

Also I swapped my ignitor and for a brief moment the car ran smooth like it should then went right back to running rough again any idea what that could be?

[Sideways s12]

ok also changed the coil pack runs a little better but still not 100% really need some help on this guys......

[fabio240]

yeah the connectors are the same.. I would recommend something like a fuel filter or try grounding the motor out sometimes your grounds get screwed up and take a look at your plugs

[boost_boy]

Hey guys I need some help again I have this issue with the ca when driving and I try to accelerate from a stop it kinda bogs down and doesn't want to go then when it gets to a certain rpm it takes off but still rides rough and isn't running at it's full potential if I go WOT the boost gauge reads 15psi which is where it's set but it's def not 15psi the turbo is still good I've checked it. I almost think it's a tps problem but the way it's acting makes me think it's something else. ANYBODY have any ideas on what it could be also how can I check the tps to see if it's still good? Also the plug for the tps kinda fell apart so I had to wire it up using female plugs from autozone but I'm not sure what order the wires go in...Any help would appreciated thanks.

Check for codes on your ecu and if there's any, report them back here and I'll give you my thoughts on what's causing them. If there is no codes, focus on your TPS plug issue. Once corrected and that doesn't help, watch out for a faulty oxygen sensor as these can cause the CA to run poorly as well. The next major area is Crank Angle Sensor, but try the others first to see how it goes. I had that issue for a long time back in 2000 in my fiance's (at the time) 1990 nissan sentra with the first USDM nissan pulsar ecu re-programmed by JWT. The car would be at 15psi, but it felt like I was only running stock boost. I tried everything imagineable up to and including taking the JWT ecu out of my personal 1990 sentra and putting it in hers and at that time, I said screw it and bought my first SDS standalone in 2001. Once I intsalled that system and worked-out the tuning, the car was wicked on the street, admirable on the drag strip and I never looked back. Just some food for thought as I know everyone don't have $1700 to throw away on a computer system, but the investment was well and worth and paid for itself over time.

[Sideways s12]

As far as codes go I'm good there aren't any...I checked. Where can I find a plug for the tps that has the same wires? I need one that's good and with a bit of wire so I can wire it right. Also I changed the o2 sensor with a known good one (didn't have the money to buy new but will when I get it) but the plug on the harness side melted a bit due to being close to the ex mani and also the issue I was having at the time was causing the mani to get amber red and catch fire lol, thus melting the plug a bit so it may not be seating all the way it's kind of a pain to get on but comes off with ease....also not sure if you read the whole thread but I replaced the ignitor and also changed the coil packs both with known good ones also swapped out the tps with what I think is a known good one I'm just not sure if they are wired up right hence why I need the plug. also has new spark plugs as well (they were needed regardless of the problem) sorry to ramble on but I want you to know the full facts so you can better educate me on whats going on or not going on...also have some wiring issues but I"ll save those for another time trying to take care of one problem at a time...Thanks a lot for responding also is there a way to get a hold of you? I notice you don't have a pm link would really help me out since you been in the game a long time I value your knowledge and advice....

[Sc0oByDo0RaCeR]

check and see if you have any boost leak.Last week my friend car was bogging at high rpm and everything you said and at the end we found a small rip on one of the coupling.

[Sideways s12]

yeah checked for boost leaks and there are none thanks!

[Sideways s12]

yeah checked for boost leaks and there are none thanks!

[boost_boy]

I don't have a problem with rapping with you "Brother". Provide me your email address and I'll get at you and we can go from there. And thanks for providing the detail info on the areas you covered on your engine as it helps narrow down some things as well.

[Sideways s12]

Thanks boost boy my email is [email protected]. Also would the cts (coolant temp sensor) cause this problem as well I'm pretty sure it needs to be changed....what do you think?

[boost_boy]

Thanks for the email addy and I'll shoot you an email later on this evening. A faulty coolant temperature would cause your car to do unimagineable things, but the issue you describe is not one of them. We'll talk a little more this evening.

[Sideways s12]

awesome thanks again bro....!

[Sideways s12]

What's up never received an email from you did you get busy? Lemme know...

[boost_boy]

Check your email.

[Sideways s12]

I checked and nothing there.....

[boost_boy]

I checked and nothing there.....

That email address is rejecting me with the "mailer daemon" from yahoo. Check your pms.

[cbh148]

So I take it that it couldn't hurt to just go ahead and put a brand new coolant temp sensor in right? I did that anyway and I'm hoping that I can write it off as "never gonna give me any issues".

[boost_boy]

Coolant temperature sensors can play-up at anytime, so changing it not completely out of the picture.

[float_6969]

This is sounding like a MAFS, or CAS issue to me, and I'm leaning more towards CAS based on the info.

[float_6969]

This is sounding like a MAFS, or CAS issue to me, and I'm leaning more towards CAS based on the info. Have you checked the cam timing? Maybe it jumped a tooth.

[Sideways s12]

I have like 5 spare mafs lol and i have swapped all of them in at one point thinking it was a maf issue as well but the car still ran the same I don't think it's possible for them all to be bad.....Boost boy also mentioned cas and that may be it but I wanted some other ideas as well......

[Sideways s12]

yeah I checked timing and it's right where I set it from when I rebuilt it hasn't budged.....and the car wa running fine after the rebuild which was about a year ago this issue im having started about 3 months ago....