Hesistation caused by fuel injectors?

[MaximumGreen]

Hi, on my '95 SE (stick), the car hesistates during acceleration a little in an oscillating manner, as the engine goes through the RPM's. Like it will hesitate for just a brief moment at say 2500, then be okay til 3200, and so on. Has anyone else experienced this? Is it caused by something with the fuel injection?

Thanks,

Brian T.

[BP2K2Max]

check your pcv valve and fuel filter before you go through injectors. maybe you have a bad sparkplug. it could be a few different problems. did your car give a check engine light?

[Nahkapohjola]

Not a fuel injector:
Hesitation typically is due to whole engine (all cylinders) functioning improperly.
- If only one injector partially malfuntions (typically), power loss would be only say half of the 1/6 cyliders =5-15%.
- If ECU (the control box for all injectors) malfuntions, the it would affect all six, and hesitation would be total. --->ECU would also now have an error code -maybe.


- "the car hesistates ...through the RPM's" -points to a single source, sensor like TPS.
- Could also be fuel pressure reg. valve or fuelpump?
- Any sensor wire poor connection (affecting ECU)



My VG30E was like that:
- Cleaned all wirings, used also contact grease on all connectors (very little or less.
- Took all control tubing off one by one, cut 1/4 inch off from each and reinserted. (leakages due to brittled ends)
- Total Ignition wiring overhaul (old system)
- TPS Throttle position sensor was faulty. Repaired (buy new).

No hesitation after this.

[MaximumGreen]

Here is a very late thank you for your reply! I will look into your suggestions. You know, I also get about 20-21 mpg on this '95 SE stickshift. 'Course, I drive about 80-90 too. But I wonder if that tells me anything.

Thanks again,

Brian

Originally Posted by Nahkapohjola

Not a fuel injector:
Hesitation typically is due to whole engine (all cylinders) functioning improperly.
- If only one injector partially malfuntions (typically), power loss would be only say half of the 1/6 cyliders =5-15%.
- If ECU (the control box for all injectors) malfuntions, the it would affect all six, and hesitation would be total. --->ECU would also now have an error code -maybe.


- "the car hesistates ...through the RPM's" -points to a single source, sensor like TPS.
- Could also be fuel pressure reg. valve or fuelpump?
- Any sensor wire poor connection (affecting ECU)



My VG30E was like that:
- Cleaned all wirings, used also contact grease on all connectors (very little or less.
- Took all control tubing off one by one, cut 1/4 inch off from each and reinserted. (leakages due to brittled ends)
- Total Ignition wiring overhaul (old system)
- TPS Throttle position sensor was faulty. Repaired (buy new).

No hesitation after this.

[Nahkapohjola]

Originally Posted by MaximumGreen

Here is a very late thank you for your reply! I will look into your suggestions. You know, I also get about 20-21 mpg on this '95 SE stickshift. 'Course, I drive about 80-90 too. But I wonder if that tells me anything.

Thanks again,

Brian

VE -engine has coil packs on spark plugs, these are known to brittle causing spark high voltage leaks to ground. I would clean them and put some self vulganizing rubbertape on. If that does not help, they have to be replaced -might be expensive. Also install new plugs.

Have set up a web page for the maxima problems. Take a Lukiluki.