outlander
NAXJA Forum User
- Location
- Columbus,Ohio
Lately I've noticed that my 89 renix has developed a problem that mostly appears when the engine gets up to operating temp.Originally I thought I had gotten some bad gas so I dumped stp and some octane booster in the tank but the problem is still there.I did a fuel pressure test today and at idle the gauge reads 29psi then it goes up to 38psi with the line disconnected to the fuel pressure regulator.Seems a few psi low compared to spec.The fuel pump is new so I dont know why it would read a little low on fuel pressure....it's only -1 psi compared to spec,right?
**The problem shows up as a miss right off idle (but never completely stalls)then clears up around 1500rpm and seems like it's happening after driving for a half hour or so when it gets up to 210-220 * Kind of like it's miss firing or a bad plug but why doesn't it do it all the time?**
Tested the tps also and it's good(4.88v input and .847v output which is 17%)no dead spot.
Took of dist cap and it's fine.
Checked for vac leaks and everything is fine there....egr valve is disconnected so thats not the problem either.
Here is a list of things that have been replaced with new parts in the last 2500 miles:
new engine,fuel pump and filter,plugs,injectors,knock sensor,manifold air temp sensor,cts,o2 sensor,cps,ignition switch, and exhaust manifold(not cracked) so I think these things can be ruled out because all this was done during the motor change and ran fine untill lately.
Could this be an ignition problem that only crops up when the coil gets hot or something?How do I tell if I have a misfire?
The dist ,cam sensor,coil,map sensor,iac,and icm are the parts that didn't get replaced during the rebuild because I ran out of funds.....
Help!!!
Thanks
**The problem shows up as a miss right off idle (but never completely stalls)then clears up around 1500rpm and seems like it's happening after driving for a half hour or so when it gets up to 210-220 * Kind of like it's miss firing or a bad plug but why doesn't it do it all the time?**
Tested the tps also and it's good(4.88v input and .847v output which is 17%)no dead spot.
Took of dist cap and it's fine.
Checked for vac leaks and everything is fine there....egr valve is disconnected so thats not the problem either.
Here is a list of things that have been replaced with new parts in the last 2500 miles:
new engine,fuel pump and filter,plugs,injectors,knock sensor,manifold air temp sensor,cts,o2 sensor,cps,ignition switch, and exhaust manifold(not cracked) so I think these things can be ruled out because all this was done during the motor change and ran fine untill lately.
Could this be an ignition problem that only crops up when the coil gets hot or something?How do I tell if I have a misfire?
The dist ,cam sensor,coil,map sensor,iac,and icm are the parts that didn't get replaced during the rebuild because I ran out of funds.....
Help!!!
Thanks
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