Please help me diagnose this problem.

Rickster

Rickster

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This problem occurs when the engine is in these RPM's, it happens when in neutral or overtaking.

Happened before and after a recent service, some days it doesnt do this.

Car: Citoen C2 1.4 VTR

Vid link


Thanks

PS: Diagnostics show no faults and engine is rated for 6500 RPM.

My thoughts: Timing is out by one tooth or cluster is showing wrong RPM and this engine is actually red limiting.
 
Sinbad

Sinbad

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Diagnostics should also be able to tell you rpm so you can compare cluster.
Have not watched video. Can you describe symptoms?
 
Pitbull

Pitbull

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Rickster said:
This problem occurs when the engine is in these RPM's, it happens when in neutral or overtaking.

Happened before and after a recent service, some days it doesnt do this.

Car: Citoen C2 1.4 VTR

Vid link


Thanks

PS: Diagnostics show no faults and engine is rated for 6500 RPM.

My thoughts: Timing is out by one tooth or cluster is showing wrong RPM and this engine is actually red limiting.
Click to expand...

It seems to idle perfectly. Doubt it's the timing. The rev's aint high so no way it's hitting limit (you can hear the revs.) Might be an airflow (leak on the intake manifold maybe?) issue or something wrong with your limiter.
 
Rickster

Rickster

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Sinbad said:
Diagnostics should also be able to tell you rpm so you can compare cluster.
Have not watched video. Can you describe symptoms?
Click to expand...

Lets say I want to overtake a truck in a hurry, I down shift and i hit 4500-5000 RPM and the car would violently jerk until i upshift or release the throttle.

The vid has more explanation.
 
Last edited:
Pitbull

Pitbull

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Sinbad said:
Diagnostics should also be able to tell you rpm so you can compare cluster.
Have not watched video. Can you describe symptoms?
Click to expand...

Sounds like it's hitting rev limit at around 4k rpm. Sound exactly like a rev limiter where it stutters around max rpm.
 
Pitbull

Pitbull

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Rickster said:
Lets say I want to overtake a truck in a hurry, I down shift and i hit 4500-5000 RPM and the car would violently jerk until i up**** or release the throttle.

The vid has more explanation.
Click to expand...

Does it still limit while in gear? Pushing it past 4k?

I know some cars have an idle rev limiter.

edit: Nvm. saw your other post now...
 
H

Hanks

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Not sure exactly your problem , but you might want to look at the neutral position switch.This tells the ECU what gear you in.On my car its been very sluggish at low rpms , and doesnt have the pull//acceleration.Plugged in a diagnostics reader and it looks like my car is only reading neutral and 6th gear.
 
Rickster

Rickster

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Hanks said:
Not sure exactly your problem , but you might want to look at the neutral position switch.This tells the ECU what gear you in.On my car its been very sluggish at low rpms , and doesnt have the pull//acceleration.Plugged in a diagnostics reader and it looks like my car is only reading neutral and 6th gear.
Click to expand...

I doubt my car is that sophisticated.
 
Sinbad

Sinbad

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Pitbull said:
Fuel pump and Fuel filter are 2 different things. Fuel pump is in the tank. Fuel filter is in the fuel line.
Click to expand...

Which exact model is it? Some evidence on the net that filter is integral with pump on some models.
 
A

A3@MBB

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In Vid 1 I can see the engine is up to temperature, but in vid 2 it is not yet completely in working temp.
Maybe the engine temp meters is reading wrong and sending wrong info to ecu?

My previous Megane 2 had a lower rev limiter in lower gears if the engine is not in the correct working temps.
 
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