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Opel Corsa C 1.0 Gasoline - Engine Won't Start, One Wet Spark Plug, Fuel Injection Issue

Peugeot407coupe 28062 19
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Why won’t my Opel Corsa C 1.0 gasoline engine start even though it has spark and fuel, with one spark plug wet and the others dry?

The most likely cause is incorrect valve timing from a jumped or stretched timing chain, and the thread’s final resolution confirmed that the timing had missed because the chain was stretched [#16865109][#16867571] Before that was found, the strongest advice was to check cylinder compression and the timing/camshaft-crankshaft synchronization, because spark and fuel alone do not guarantee the engine can run [#16862716][#16865093][#16867207] One reply also warned that if the timing jumped, the valves may have been damaged and the complete timing set should be replaced, not just the chain [#16867580]
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  • #1 16862655
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    Hello.
    I have Corse 1.0 gasoline. I can not start the engine. The spark is. Fuel comes to the injection molding, only that after shooting one candle is wet and the other two dry. What is the problem? Please help. I will add that the car does not burn even on the floor.
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  • #2 16862716
    jerry1960
    Level 37  
    Posts: 3013
    Help: 283
    Rate: 1549
    The spark is at the right moment, on all cylinders, it happened suddenly. The timing did not jump. Measure the compression pressure.
  • #3 16862765
    woi
    Level 2  
    Posts: 4
    Help: 1
    Rate: 7
    I assume you have fueled the right fuel

    1. Check the compression - if the cylinders are rinsed with fuel, it will not start.
    2. Errors - if P0300, P0301 ...... P0303 appear in the controller, the engine controller may cut off the fuel (so as not to rinse the cylinders).
    3. Replace or dry wet candle (if it is "pierced" drying will not help)
    4.If no compression - seal with motor oil and check the compression again.
    5. Probably if there is a spark and an injection (wet candle) synchronization of the shaft / camshaft is OK possible (P0335, P0340)
    6. If it does not start, and the candle and compression OK - you need to check the impulses on the injection (after erasing errors).

    Added after 5 [minutes]:

    I forgot about the most important one - check if you have an efficient exhaust system - if there is an exhaust outlet during the filming.
  • #4 16862971
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    I had a problem with the fuel pump earlier.
    now it is so that the car does not catch with the pump on.
    if the exhausted relay from the pump attempts to catch, but does not burn even on the plow.
    if it's a relay or bridges it, it does not catch
  • #5 16863075
    woi
    Level 2  
    Posts: 4
    Help: 1
    Rate: 7
    If the car tries to run with the fuel pump turned off then it looks like:
    1. Temperature sensor - damaged (pause) - the controller sees -40 degrees C and floods the engine
    2. Damaged flow meter - and floods the engine
    I assume that the pressure on the bar OK.
  • #6 16863143
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    after unscrewing the breather on the strip, the fuel flies under pressure

    Added after 7 [minutes]:

    errors p0201 p0202 p0203 pop up
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  • #7 16863564
    jerry1960
    Level 37  
    Posts: 3013
    Help: 283
    Rate: 1549
    Check the wires from the computer to the injections.
  • #8 16865017
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    I noticed that instead of taking the air from the throttle, it blows.
    I DO NOT want to fire on the plot. He spits him out. After pulling the fuel pump relay, the car tries to catch. with the switch on the pump does not catch. I am asking for help and hints.
    The spark is.
    The fuel reaches the injection molding.

    Added after 1 [minutes]:

    I will add that the car is trying to run with the fuel pump switched off
  • #9 16865093
    DriverMSG
    VIP Meritorious for electroda.pl  
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    Check the pressure in the cylinders.
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  • #10 16865109
    grala1
    VAG group specialist  
    Posts: 9812
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    If it blows the throttle, it is worth checking the timing setting.
  • #11 16867207
    woi
    Level 2  
    Posts: 4
    Help: 1
    Rate: 7
    I never run the gasoline engine "off the pitch" so I do not know if the candle can ignite the mixture of poster-air. Diesel engine which
    this way you can fire it is not the same. In my opinion, if the engine catches on residual fuel that stays in the collector after switching off
    Fuel pumps this timing should be OK. You have not responded as with compression. Try unsealing the exhaust just after the suction manifold (eg, turn the lambda probe). The candles must be dry whenever you try to start.
    P0201 errors .... P0203 concern injector circuits - eg no power supply, damaged wires (all ????), faulty controller,
    but also TOTAL INJECTION OF INJECTORS by the controller so that the engine does not flood.
    Do you have the possibility to check the temperature and air flow using the tester?
  • #12 16867571
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    Problem solved.'
    He missed the timing. just now listen to clattering around the chain. the chain is stretched. What's the fault?
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  • #13 16867580
    robokop
    VIP Meritorious for electroda.pl  
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    As the timing jumped, the valves went down. Wine only and exclusively by the user - with the course of around 150,000 km in advance should be replaced kpl. timing - chain, sprockets, slides and tensioner.
  • #14 16867588
    Pawel wawa
    VIP Meritorious for electroda.pl  
    Posts: 16093
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    And now replace the engine. I have already had these cars twice after the repairs, after the collision of pistons with valves, like on electronics, and the defects turned out to be mechanical.
  • #15 16867589
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    clacking fades when screwed in to turn '

    Added after 1 [minutes]:

    In my opinion, it is not a valve because the sound comes from the chain
  • #16 16867600
    robokop
    VIP Meritorious for electroda.pl  
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    Peugeot407coupe wrote:
    In my opinion

    This is your opinion. And you will do as you like. Take off the lid and look kindly on which valves you have too much play now.
  • #17 16867622
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    And if there were valves damaged it would be the right pressure of compression because I have 10 bars on each cylinder
    [/ B]
  • #18 16867628
    robokop
    VIP Meritorious for electroda.pl  
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    Peugeot407coupe wrote:
    I have 10 bars on each cylinder

    And I will ask - the chain remained the same?

    Added after 1 [minutes]:

    Peugeot407coupe wrote:
    I have 10 bars on each cylinder

    This is not enough.
  • #19 16867646
    Peugeot407coupe
    Level 7  
    Posts: 8
    Rate: 6
    the chain is the same but it is stretched
  • #20 16867649
    robokop
    VIP Meritorious for electroda.pl  
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    Peugeot407coupe wrote:
    the chain is the same but it is stretched

    Excuse me, but we have no more to talk about. I close.
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Topic summary

✨ The discussion revolves around an Opel Corsa C 1.0 gasoline engine that fails to start, with one spark plug wet and the others dry. Initial suggestions include checking compression pressure, ensuring the correct fuel is used, and diagnosing potential issues with the fuel injection system. Users mention error codes related to injectors and the possibility of a damaged temperature sensor or flow meter causing flooding. The problem is eventually identified as a timing issue, with a stretched timing chain leading to potential valve damage. Recommendations include checking the timing setting and replacing the timing components to prevent further engine damage.
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FAQ

TL;DR: Opel Corsa C 1.0 no-start traced to timing jump; compression measured 10 bar/cyl, “This is not enough.” [Elektroda, robokop, post #16867628]

Why it matters: Quick checks of compression, timing, injectors, and flooding can save an engine from valve damage and costly repairs.

This FAQ is for owners and techs troubleshooting Corsa C 1.0 gasoline engines that crank but won’t start.

Quick Facts

Why is one spark plug wet while the other two are dry?

A wet plug shows that cylinder is getting fuel but not burning it. Dry plugs suggest no injection or cut-off there. The ECU can disable injectors to prevent cylinder wash-down, logging misfire or injector-circuit faults. Dry or replace the wet plug, then clear codes and retest. “Replace or dry wet candle.” [Elektroda, woi, post #16862765]

What do codes P0201, P0202, and P0203 mean on a Corsa C?

They indicate injector circuit faults on cylinders 1–3 or an ECU-commanded total injection cut. Causes include wiring faults, lack of injector power, or protective shutoff due to flooding. Inspect harness continuity from ECU to injectors and confirm 12 V feed. Clear codes and recheck after cranking. [Elektroda, woi, post #16867207]

Why does my engine try to start only with the fuel pump relay pulled?

That behavior points to an over-rich, flooded condition. A failed coolant temperature sensor reading −40°C or a faulty MAF can make the ECU overfuel. With the pump off, residual fuel leans the mixture enough to catch briefly. Verify sensor readings with a scan tool. [Elektroda, woi, post #16863075]

It blows air back through the throttle while cranking—what does that mean?

Blowback through the throttle strongly indicates incorrect cam-to-crank synchronization. On this engine, a stretched or jumped timing chain can cause intake reversion and a no-start. Inspect timing alignment before extended cranking to avoid valve damage. [Elektroda, grala1, post #16865109]

How do I check compression and what number should I expect?

Perform a wide-open-throttle compression test on all three cylinders with the fuel and spark disabled. The thread’s measured 10 bar per cylinder was deemed too low for a reliable start. Re-test after adding a teaspoon of oil if readings are low, to assess sealing. [Elektroda, robokop, post #16867628]

Could a stretched timing chain cause clatter and a no-start?

Yes. A stretched chain can jump timing, cause clatter, mis-synchronization, and valve contact. Replace the complete timing set—chain, sprockets, guides, and tensioner—rather than the chain alone, especially near 150,000 km. “Replace kpl. timing.” [Elektroda, robokop, post #16867580]

Should I worry about bent valves after a timing jump?

Yes. Piston-to-valve contact is possible once timing slips. Engines may appear to start after electronics repairs, yet still fail from mechanical damage. Inspect valve clearances and leakdown before further driving. Some cases needed full engine replacement after collision. [Elektroda, Pawel wawa, post #16867588]

How do I test injector wiring from the ECU?

Backprobe each injector control wire for continuity from the ECU connector to the injector plug. Check for proper 12 V feed on the common supply and verify ECU pulsing with a noid light. Repair any open or shorted wires before replacing parts. [Elektroda, jerry1960, post #16863564]

Could a blocked exhaust cause a crank-no-start?

Yes. A fully blocked exhaust prevents scavenging, making starting impossible. During cranking, you should feel exhaust flow. Temporarily loosen the system near the manifold or remove the upstream oxygen sensor to create a bypass for testing. [Elektroda, woi, post #16862765]

What does it mean if fuel sprays at the rail but it still won’t start?

Pressure at the bleed indicates delivery to the rail, but mixture, timing, or injector control may still be wrong. With P0201–P0203 active, the ECU might not pulse injectors. Fix electrical faults and verify timing before blaming fuel pressure. [Elektroda, Peugeot407coupe, post #16863143]

How can I safely unflood the Corsa engine?

  1. Remove all spark plugs; dry or replace any wet plugs.
  2. Disable fuel; crank 5–10 seconds to clear cylinders, then refit plugs.
  3. Erase codes; re-enable fuel and attempt start with full throttle (clear-flood). Investigate temp sensor and MAF readings if flooding returns. [Elektroda, woi, post #16862765]

What is a DTC and why does it matter here?

A Diagnostic Trouble Code (DTC) records a detected fault. In this case, injector-circuit DTCs P0201–P0203 point directly to wiring or commanded shutdown. Reading live data alongside DTCs speeds diagnosis and avoids unnecessary parts. [Elektroda, woi, post #16867207]

Does the ECU ever stop all injection during cranking?

Yes. To protect the engine from fuel wash-down, the ECU can totally cut injection if it detects certain errors. This can produce dry plugs on some cylinders and a no-start. Clear faults, fix wiring, and reattempt. [Elektroda, woi, post #16862765]

My chain clatter fades at higher rpm—can I ignore it?

No. Noise reduction with rpm does not mean it is safe. Chain slack can briefly tension with oil pressure, yet still be out of time. Continued running risks valve damage. Replace the complete timing set promptly. [Elektroda, robokop, post #16867580]

What’s a quick triage sequence for this no-start?

Check compression on all cylinders. Verify timing alignment if you hear chain clatter or see throttle blowback. Scan for P0201–P0203; if present, test injector power and continuity, then address flooding causes before further cranking. [Elektroda, woi, post #16867207]
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