Test TPS

[Moli]

Eccovi il cod. vin 1G1YY2387M5111994
Un'altra cosa: ho notato che il problema peggiora a macchina calda.

[Moli]

Eccovi il cod. vin 1G1YY2387M5111994
Un'altra cosa: ho notato che il problema peggiora a macchina calda.

[Christian GM]

Questi sono i dati generali del tuo mezzo;

Caratteristiche del veicolo

Identificazione del Veicolo
Veicolo: Chevrolet Corvette (1984-1996)
VIN:: 1G1YY2387M5111994
Modello Anno: 1991 (04/04/1991)
Descrizione modello
Modello: 1YY07 CORVETTE (WB 96) 2 DR PLAINBACK / HATCHBACK Data: 03/11/2005
Unità: Ora: 07.53.47
Serie: 1YY - CORVETTE (WB 96)
Stile della 07 - 2 DR PLAINBACK / HATCHBACK
carrozzeria:
Informazioni supplementari sul veicolo

Tipo Caratteristiche del veicolo

FABBRICATO IN U.S. BUILT
COSTRUTTORE GENERAL MOTORS, GENASYS L.C.
SERIE CORVETTE
CARROZZERIA 2 DOOR COUPE/SEDAN HATCHBACK/LIFTBACK 07, 08, 77, 87
RESTRIZIONI ACTIVE (MANUAL) BELTS WITH DRIVER INFLATABLE RESTRAINT
MOTORE 1.6L L4 LV4/ 5.7L V8 L98/ 4.5L V8 LQ6
STABILIMENTO BOWLING GREEN, KY


Fermo restando che sarebbe utile attaccare un tester e vedere se la centralina presenta guasti o meno, l'unico difetto riconosciuto da GM con le tue precise caratteristiche riguarda la pompa benzina; visto che dici che si accentua a caldo. Si può controllarne la pressione con un apposito manometro che normalmente qualsiasi autoriparatore possiede.

Se fosse così:
pompa benzina € 140.64 + IVA 25163463
guarnizione € 13.45 + IVA 25091503
filtro benz € 20.90 + IVA 25171792

materiale originale AC Delco, disponibile in GM Europe.

Vedi questo bollettino tecnico:

FUEL PUMP DRIVEABILITY ISSUE DIAGNOSTIC INFORMATION #92-227-6E - (Jun 4, 1992)
Subject: FUEL PUMP RELATED DRIVEABILITY ISSUES

Model and Year: 1991-92 CAMARO, CAVALIER, CORSICA, BERETTA, LUMINA ND CORVETTE 1992 C1, K1, L/M AND S/T TRUCKS 1992 LUMINA APV

ENGINE APPLICATIONS: SUBJECT:

Car VINs A, B, D, F, H, J, L, N, P, Fuel Pump Noise; Engine Hesitation, T, X,1, 3, 4, 8 Sag, Loss of Power; or No Start Truck VINs E, H, K, L, W, Z (Fuel Pump or Contaminated Fuel supply) VEHICLE/TRUCK APPLICATIONS:

1991-92 Model Year F, J, L, W, Y Cars 1992 Model Year C, K, L, M, S, T Trucks 1992 Model Year U Van

CONDITION:

--------- Customer may comment of fuel pump noise/whine and/or cold start stall; engine hesitation, sag, loss of power; or check engine light with codes 32 or 44. Condition(s) may be intermittent, but would typically be experienced in the first 5 minutes of engine/vehicle operation.

CAUSE:

----- Possible fuel starvation.

The following matrix is provided to help during diagnosis activities.

Diagnostic Aids:

1. Oxygen sensor reading biased toward lean when the engine Is under load.

2. Fuel pressure drops or does not increase by at least 5 psi when throttle moves from idle to part throttle.

3. Fuel integrator values steadily increasing under load.

4. Intermittent condition temporarily eased when accelerator pedal is released. Condition returns when accelerator pedal is reapplied.

5. Complete loss of fuel pressure.

CORRECTION:

---------- Use Section 6E3 of the appropriate service manual to diagnose possible fuel system related problems. The vehicle may need to be operated under a load while monitoring fuel pressure to detect the problem.

IMPORTANT: MAKE CERTAIN THE FUEL SYSTEM IS PERFORMING TO SPECIFICATIONS BEFORE OTHER ENGINE CONTROL SYSTEM COMPONENTS ARE SERVICED.

PROCEDURE:

--------- Follow procedures identified in the appropriate service manual or: for 1992 "J" vehicles specifically, see Dealer Service Bulletin No. 92-176-6C, dated April 1992; for electrical intermittents, see Dealer Service Bulletin No. 92-05-8A, 86-56 and 88-101-8A as well as Section 8A of the service manual and instruction in required tool J-38125 usage.

Figure 1

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

[Christian GM]

Questi sono i dati generali del tuo mezzo;

Caratteristiche del veicolo

Identificazione del Veicolo
Veicolo: Chevrolet Corvette (1984-1996)
VIN:: 1G1YY2387M5111994
Modello Anno: 1991 (04/04/1991)
Descrizione modello
Modello: 1YY07 CORVETTE (WB 96) 2 DR PLAINBACK / HATCHBACK Data: 03/11/2005
Unità: Ora: 07.53.47
Serie: 1YY - CORVETTE (WB 96)
Stile della 07 - 2 DR PLAINBACK / HATCHBACK
carrozzeria:
Informazioni supplementari sul veicolo

Tipo Caratteristiche del veicolo

FABBRICATO IN U.S. BUILT
COSTRUTTORE GENERAL MOTORS, GENASYS L.C.
SERIE CORVETTE
CARROZZERIA 2 DOOR COUPE/SEDAN HATCHBACK/LIFTBACK 07, 08, 77, 87
RESTRIZIONI ACTIVE (MANUAL) BELTS WITH DRIVER INFLATABLE RESTRAINT
MOTORE 1.6L L4 LV4/ 5.7L V8 L98/ 4.5L V8 LQ6
STABILIMENTO BOWLING GREEN, KY


Fermo restando che sarebbe utile attaccare un tester e vedere se la centralina presenta guasti o meno, l'unico difetto riconosciuto da GM con le tue precise caratteristiche riguarda la pompa benzina; visto che dici che si accentua a caldo. Si può controllarne la pressione con un apposito manometro che normalmente qualsiasi autoriparatore possiede.

Se fosse così:
pompa benzina € 140.64 + IVA 25163463
guarnizione € 13.45 + IVA 25091503
filtro benz € 20.90 + IVA 25171792

materiale originale AC Delco, disponibile in GM Europe.

Vedi questo bollettino tecnico:

FUEL PUMP DRIVEABILITY ISSUE DIAGNOSTIC INFORMATION #92-227-6E - (Jun 4, 1992)
Subject: FUEL PUMP RELATED DRIVEABILITY ISSUES

Model and Year: 1991-92 CAMARO, CAVALIER, CORSICA, BERETTA, LUMINA ND CORVETTE 1992 C1, K1, L/M AND S/T TRUCKS 1992 LUMINA APV

ENGINE APPLICATIONS: SUBJECT:

Car VINs A, B, D, F, H, J, L, N, P, Fuel Pump Noise; Engine Hesitation, T, X,1, 3, 4, 8 Sag, Loss of Power; or No Start Truck VINs E, H, K, L, W, Z (Fuel Pump or Contaminated Fuel supply) VEHICLE/TRUCK APPLICATIONS:

1991-92 Model Year F, J, L, W, Y Cars 1992 Model Year C, K, L, M, S, T Trucks 1992 Model Year U Van

CONDITION:

--------- Customer may comment of fuel pump noise/whine and/or cold start stall; engine hesitation, sag, loss of power; or check engine light with codes 32 or 44. Condition(s) may be intermittent, but would typically be experienced in the first 5 minutes of engine/vehicle operation.

CAUSE:

----- Possible fuel starvation.

The following matrix is provided to help during diagnosis activities.

Diagnostic Aids:

1. Oxygen sensor reading biased toward lean when the engine Is under load.

2. Fuel pressure drops or does not increase by at least 5 psi when throttle moves from idle to part throttle.

3. Fuel integrator values steadily increasing under load.

4. Intermittent condition temporarily eased when accelerator pedal is released. Condition returns when accelerator pedal is reapplied.

5. Complete loss of fuel pressure.

CORRECTION:

---------- Use Section 6E3 of the appropriate service manual to diagnose possible fuel system related problems. The vehicle may need to be operated under a load while monitoring fuel pressure to detect the problem.

IMPORTANT: MAKE CERTAIN THE FUEL SYSTEM IS PERFORMING TO SPECIFICATIONS BEFORE OTHER ENGINE CONTROL SYSTEM COMPONENTS ARE SERVICED.

PROCEDURE:

--------- Follow procedures identified in the appropriate service manual or: for 1992 "J" vehicles specifically, see Dealer Service Bulletin No. 92-176-6C, dated April 1992; for electrical intermittents, see Dealer Service Bulletin No. 92-05-8A, 86-56 and 88-101-8A as well as Section 8A of the service manual and instruction in required tool J-38125 usage.

Figure 1

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.

[Moli]

[^]Grazie Christian. Ti rangrazio tantissimo per il tuo interessamento
Fare il test per la centralina non è semplicissimo in quanto qui in zona sembra che nessun meccanico lo abbia, per non dire la faccia che fanno quando glielo chiedo, forse a Pavia trovo qualcuno. Mal che vada te la porterò presso la tua officina purtroppo il mezzo non potrà venirci sulle sue ruote. Se vuoi venire tu (sai se maometto non va alla mantagna...) ti pago la trasferta e il pranzo in un buon ristorante sulle colline piacentine.
In ogni caso devo rimandare tutti questi lavori a gennaio in quanto ora sono incasinato con altro (vedi dentista che mi sta costando più di un v8 nuovo).
Prima di tutto il patatrak con il radiatore e problemi connessi la macchina ogni tanto dava "soon service" quando viaggiavo per un po'(30") a velocità costante. Se invece tiravo non si accendeva mai.
Quindi qualche problema latente deve sempre averlo avuto.
Ringrazio di nuovo te e tutti i ragazzi del forum.

[Christian GM]

A Pavia c'è un concessionario ufficiale GM.
Non mi risulta però che lavori su vetture non ufficiali, dovresti chiedere. Purtroppo non li conosco personalmente per poterti aiutare.

Buona continuazione dal dentista