Car is missing on highway..... HELP

[1QUICK4]

I bought my 240sx not too long ago and did the sr20 swap. On the highway at a constant throttle it misses alot, the wideband jumps to 17,18 then pegs out really quick. If you accelerate just a little bit it comes out of it, if you let off and go back to a constant throttle it will go away. The plugs are good. Sometimes it does it alot and at other times it barely does it. Any help would be appreciated. Thanks in advance

Could it be the TPS? Needs a little adjusting?

[gripstr]

your topic title is quite misleading

hope someone jumps in

[Clawhammer]

lol yeah I thought your car broke down and when you came back for it it was gone haha.

[1QUICK4]

LOL, no it just doesn't run right at regular highway speed in 5th gear, sorry. Guess I should have worded the title better.

[tjmhillz]

hahah i thought somebody stole ur car on highway hahah.. title is very misleading. maybe a mod can change title for u.. check maf and check piping

[Dattebayo]

This really belongs in the RWD SR20 forum, but I would suggest looking at your coil packs. One or more may be losing charge and need to be replaced. This would be most noticeable on the highway during acceleration or during long periods of driving as they heat up.

[NICONick]

Mine has been doing this of late too.....let me know what you end up doing.

[nateb]

LMAO i thought u lost ur car on the highway LOL

but anyways since it happens sometimes my guess would be something electrical check ur MAF and TPS

[NICONick]

wouldnt the MAF throw a code tho ?

If something were to be wrong with it?

PS I have the KA not the SR liek the OP not to thread jack, just experiencing a similiar prob

[exode]

Same problem here, since the higher gears offer more resistance and you make boost at a lower rev, the bogging makes itself noticed.

I'd bog around 3500rpms in 5th gear, it turned out to be a bad coil pack.

[1QUICK4]

I got another coil pack laying around, I"ll try changing one at a time and test driving it and see if that fixes it.

[NICONick]

Coil pack help?

[92SR20S13]

I know you said your plugs were fine but..what are they gapped to

[Nissan786]

Im having the same thing going on. did replacing the coil pack help?

[1QUICK4]

I replaced all my coilpacks with ones from a friends 240 and it ran good. 2 of mine weren't really white anymore, they were yellowish colored. I bought a set and replaced the two and it runs fine now.

[Nissan786]

how much did the set run you im trying to get things priced out so this things runs great for a change.

[1QUICK4]

I bought 4 coilpacks, got em off of this site actually. I only needed two, how many do you need?

[Nissan786]

i think im just gonna replace all 4 and do a complete tune up

[Camry]

lol yeah I thought your car broke down and when you came back for it it was gone haha.